Kakarot the Gemini does have variable lift speeds. If you look at the sides of the track just before the lift you can see sencors, again on lift and towards the end, before the tirms. The sensors slow the lift for the train that is ahead, so the other can catch up. Dueling Dragonds at Universal Studios, weighs the trains so the lighter train goes over first.
*** This post was edited by B-Town on 4/21/2000. ***