Hey Gabe, where are the pistons???
(Hopefully Gabe doesn't mind, I think it's been revealed already)
We have two 2-bore pistons that retract, and through some sort of linkage, raise the ramp up. The linkage becomes stable at the top of its travel, so one bot can part on the flat part and the other gets lifted a foot into the air while on the ramp.
Now if you'll excuse me, I need to get to the shop ASAP. I overslept... again.