nice, maybe make it heavier and slower? it just seems to wheelie at the slightest touch. and make the track longer. the suspension's great, it gets over anything.
but if you had lots of these, all working in unison, they would all produce energy and hopefully someguy would invent a way to change gravity. it might tear the universe apart, but at least we get renewable power.
nice, i like making "bombs" with these kind of things (make a box and place it somewhere inside the tower, it pushs away all blocks it overlaps. i don't like the way the tower "bounces" when it collapses, maybe u need to reduce hinge strenth. other than that, 9/10