Hi!
Leav here from Israel's ThunderBolts [2630].
I Really like how your robot is not the conventional "box" design..
Some more information about it would really be nice.
For example those 24" pistons look very suited for the job. how fast do they open the scissor lift? seems to me they also help keep the system rigid (most scissor lifts I have seen are pretty wobbly), is this true?
do you use two drive wheels and two "crazy wheels"? is there one crazy wheel up front and one back or just two front? (or maybe just one in the front

)
how do you pick up the ball? (do you?)
good luck with your robot. seems like a very reliable design to me!
-Leav