This is the second grindrail i made, I made it out of an old fence pole that i found in my garage.  It's a little shaky, but it works.  I only bolted down one end because i wanted a nice smooth ride till the end.  If you avoid the first part and grind on the rest it's great.  All i did was put two long pieces of wood at an angle and then used two smaller pieces of wood to hold them on each end.  If you still don't get it, just stare at the pictures and hopefully you'll figure it out.       aiight...imma go skate now, so PEACE!!!