Now available the new and improved Full Body Conversion Flight Unit (the original was recalled after a design fault was detected) which is now a completely different design to the original. Now, instead of the twin small underpowered jet engines, you have a choice of twin rotors, counter-rotating single stalk rotors or twin turbine engines (combat proven designs them all).
It should be noted that All systems are designed for the borg to be left in the standing position during takeoff/landing and only the first 2 systems designed to fly at great speed with the borg horizontal (the first number for those systems). All systems are also equipped with explosive bolt escape systems to ditch a damaged Flight Unit.
A Pilot skill is also required to use these systems competently (a single chipslot is built into all designs)