Fighting 140
Weapons 120
Speed 160
Power 120
Armor 120
Total 660
The upgrade to the Deathscythe Hell added a few things, namely a twin beam scythe and an active cloak. The machine cannons were removed.
Fighting 150 - This was increased due to the effectiveness of the twin beam scythe.
Weapons 120 - Unchanged, due to the removal of the machine cannons and the addition of a twin beam scythe.
Speed 170 - This is where you'll notice a trend. All the Gundams' (minus the Wing) main attribute was raised 10 points. Sometimes it makes sense, but in this case, it doesn't. Nothing explains the increase to speed. In fact, the Deathscythe Hell is heavier and should move slower. But this is an official number and there is no debating it.
Power 120 - Unchanged, nothing was added to require more power. Beam blades do not weigh anything.
Armor 140 - This 20 point increase is due to the addition of the active cloak. The active cloak also adds to the 0.2 ton increase.
Total 700
Fighting 110
Weapons 160
Speed 110
Power 140
Armor 140
Total 660
The Heavyarms Kai added a dual beam gatling to the Heavyarms arsenal. Please note that the Heavyarms Kai's ability levels were never released*.
Fighting 110 - Unchanged, nothing was added to modify this.
Weapons 170 - This is from the addition of the twin beam gatling and to stay consistent ith the other Gundams. The added barrel and ammunition would add to the large weight difference between the Heavyarms and Heavyarms Kai.
Speed 130 - Since the Heavyarms needed to be upgraded for battle in space, the extra thrusters needed to maneuver would add to speed, thus the 20 point increase.
Power 150 - The twin beam gatling would add more weight to the Heavyarms Kai's arm from the added barrel and ammunition. Larger, more powerful actuators would be needed to lift this extra weight. The power increase is also explained through the weight difference between the Heavyarms and Heavyarms Kai.
Armor 140 - Unchanged, although it is possible that armor increased the weight difference and armor should be given the additional 10 points, rmoving them from power.
Total 700
Fighting 120
Weapons 120
Speed 110
Power 150
Armor 160
Total 660
The Sandrock Kai added a beam machinegun. Note that the Sandrock Kai's ability levels were never released*.
Fighting 120 - Unchanged, nothing was added to change fighting ability.
Weapons 130 - The addition of the beam machinegun adds to the Sandrock Kai's weapon ability.
Speed 130 - Much like the Heavyarms, the Sandrock neede to be upgraded for space battle, and 20 points were allocated, and also to stay consistent.
Power 150 - Unchanged, the beam machinegun could easily be handled with 150 power.
Armor 170 - Increased 10 points to stay consistent with every Gundams' main ability being increased. This increase can also be seen in the weight difference between the Sandrock and Sandrock Kai. The beam machinegun could not take up all this weight by itself.
Total 700
Fighting 160
Weapons 110
Speed 130
Power 140
Armor 120
Total 600
The Altron added an additional dragon fang with two flamethrowers, and twin beam cannons. The beam glaive was upgraded to a twin beam trident.
Fighting 170 - This 10 point increase is due to the additional dragon fang, and the beam blade at the end of the Altron's staff.
Weapons 140 - The twin beam cannons and the two flamethrowers upped the Altron's weapons 30 points.
Speed 130 - Unchanged, nothing was added to change the Altron's speed.
Power 140 - Unchanged, nothing that heavy was added that required more power.
Armor 120 - Unchanged, no armor was added to the Altron.
Total 700
Heavyarms Kai
Fighting 120
Weapons 170
Speed 120
Power 140
Armor 140
Total 690
Sandrock Kai
Fighting 120
Weapons 120
Speed 120
Power 150
Armor 160
Total 670
Doesn't make much sense, does it? Why would the Heavyarms Kai recieve 10 points to fighting? And the Sandrock Kai's beam machinegun added nothing to weapons? And we also have 3 Gundams with their main abilities at 170, and the Sandrock Kai stays at 160?
I think you can see why I decided to use my own values. It is far more consistent.
Fighting 130
Weapons 140
Speed 150
Power 120
Armor 130
Total 670
The Wing was 10 points ahead of the other Gundams. The Wing Zero added the Zero System, and the twin buster rifle. The vulcans were modified to wing vulcans.
Fighting 150 - No explanation. Nothing was added to increase fighting, let alone increase it 20 points. How much output can you possibly add to a beam saber? May be a result of the power ability increase.
Weapons 150 - The twin buster rifle would these 10 points, as well as add much more weight to the Wing Zero.
Speed 160 - The more powerful wing engines would add to these 10 points.
Power 140 - Most likely added so the Wing Zero could slash harder with its beam sabers, thus doing more damage and increasing the fighting potential.
Armor 140 - The Wing Zero weight significantly more than the Wing. This weight difference is most likely added armor.
Total 740
The Wing Zero is 40 points ahead of the other four Gundams. Everything got at least a 10 point increase. Weapons makes sense, as does speed. I made a correlation between the power and the fighting abilities, as they both got a 20 point increase. Armor can be explained through the large weight difference.
Fighting 150
Weapons 120
Speed 170
Power 120
Armor 140
Total 700
The Deathscythe Hell Custom removed the twin beam scythe and the buster shield. It added however the beam scissors.
Fighting 150 - The removal of the twin beam scythe, but the addition of the beam scissors keeps fighting at 150.
Weapons 110 - The removal of the buster shield lowers weapons to 110.
Speed 190 - The speed was raised 20 points to stay consistent with the other Gundams, which will be seen later.
Power 120 - Unchanged, nothing was added to change power.
Armor 150 - The additiion of the larger active cloak and a small shield on each forearm added 10 points to armor.
Total 720
Fighting 110
Weapons 170
Speed 130
Power 150
Armor 140
Total 700
The Heavyarms Kai Custom removed only the army knife, changed the dual beam gatling to two dual gatling guns, added two more chest gatlings, and many more homing and micro missiles. Note that beam projectiles have a significantly higher velocity than ballistic projectiles.
Fighting 110 - Unchanged, the loss of the army knife was minor.
Weapons 190 - The change of the dual beam gatling to the two dual gatling gun would keep long-range firepower the same, and the added two chest gatlings, 30 homing missiles, and 28 micro missiles would add at least 20 more points to weapons, and it would also stay consistent with the other Gundams.
Speed 130 - Unchanged, nothing was added to increase speed.
Power 150 - Unchanged, nothing was added to require more strength. Note that the 150 power added to Heavyarms Kai would be placed equally in both arms, not just one.
Armor 140 - Unchanged, no new armor was added to the Heavyarms Kai Custom.
Total 720
Fighting 120
Weapons 130
Speed 130
Power 150
Armor 170
Total 700
The Sandrock Kai Custom removed a shield, cross crusher, homing missiles, shield flasher, and beam machinegun. However, the optional shoulder armor was added. A shield does come with the 1/144th scale model kit, but it was never seen in Endless Waltz and thus will not be counted.
Fighting 130 - The heat shorters were made much longer and larger than the originals, thus the 10 point increase.
Weapons 110 - The loss of the two homing missiles and the beam machinegun lowered weapons 20 points due to the Sandrock Kai Custom's lack of powerful long-range weaponry. The shield flashers were non-offensive equipment, and the cross crusher was a combined optional weapon, so their loss will not lower the weapons ability.
Speed 130 - Unchanged, nothing was added to increase speed.
Power 160 - The larger and heavier heat shorters would require more power to handle efficiently, so 10 more points to power would be needed.
Armor 190 - The added optional shoulder armor and loss of most weapons and shield but still maintaining the same weight as Sandrock Kai suggest added armor, plus the 190 points is consistent with the other Gundams.
Total 720
Fighting 170
Weapons 140
Speed 130
Power 140
Armor 120
Total 700
The Altron Custom removed the twin beam cannons and four flamethrowers. Nothing was added to the Altron Custom.
Fighting 190 - The longer range and flexibility of the new dragon fangs added 10 points each to fighting, for a total of 20 points.
Weapons 110 - The loss of the quad flamethrowers and dual beam cannons lowered weapons down 20 points.
Speed 150 - Given how the Altron was able to keep up with the Wing Zero Custom in Endless Waltz, and that the Altron Custom has the 3rd highest thruster weight and 2nd lightest base weight, the speed was increased 20 points.
Power 140 - Unchanged, nothing was added to require more power.
Armor 130 - Each dragon fang can function as a shield, so 10 points to armor was allocated.
Total 720
Then I realized that the Heavyarms Kai Custom didn't lose anything, and it didn't make any sense how the Heavyarms Kai and Heavyarms Kai Custom could both have 170 weapons when the latter had twice as many weapons as the former. I assumed that if the Heavyarms Kai never existed and the Heavyarms was upgraded straight to the Heavyarms Kai Custom, then the 20 points to speed would still be needed and I couldn't allocate them to weapons to compensate and make everything equal to 700 total ability points I had planned earlier.
Thus I treated the Endless Waltz Mecha as customized upgrades rather than equipment changes. It wasn't as large an upgrade as the Gundam Wing upgrades, but every Gundam still benefitted from it in the end.
As I added and subtracted points from each Gundam, I noticed that 3 out of 4 Gundams were at 720 points (the Altron Custom was less). I took into account base weights and thruster weights, and I managed to even every Gundam out at 720 points.
I also noticed that 2 out of 4 Gundams' main abilities were at 190 points (the Deathscythe Hell Custom was more and the Sandrock Kai Custom was less). Keeping in mind the consistency of the Gundam Wing upgrades, I reallocated some points and I managed to keep all the main abilities at 190 points.
All this is completely unofficial. The Endless Waltz ability levels were never released in any book that I know of. I gave the best attempt to standardize the Gundams as much as possible.
Fighting 150
Weapons 150
Speed 160
Power 140
Armor 140
Total 740
The Wing Zero is 40 points ahead of the other Gundams. The Wing Zero Custom removed the wing vulcans and the shield. Nothing was added.
Fighting 160 - Increased 10 points with no explanation. Possibly a result of the power increase.
Weapons 150 - Unchanged, the removal of the wing vulcans was minor.
Speed 175 - The addition of the four, very large "wings" would add to the Wing Zero Custom's speed.
Power 150 - The strength needed to use these wings would raise power at least 10 points. Also may increase fighting due to stronger close-combat attacks.
Armor 140 - Unchanged, the removal of the shield and the addition of the wings keep armor at the same level.
Total 775
The Gundam Wing upgrades increased abilties 40 points. The Endless Waltz upgrades increased abilities 20 points. The Wing Zero was 70 points higher than Wing. To stay consistent, the Wing Zero Custom is 35 points higher than Wing Zero. Wing Zero increased every ability. Wing Zero Custom increased half of the abilities (actually 2.5, rounded up to 3).
The speed increase is valid, and the correlation between fighting and power is consistent with the Wing Zero as well. Everything else is unchanged.
The Wing Zero Custom is rather vague, but the Wing Zero itself was vague, and its abilities are official where as the Wing Zero Custom is completely theorized.