Here it is, RAGE 2005.
Wooden base
AM shifters
arm extends 12’ 6" in 3.5 seconds.
Low CG. We drove it holding a tetra 10’ in the air and had no problems. It even turns quickly and can stop suddenly while holding a tetra that high.
Here it is, RAGE 2005.
Is it steady under load? Does it wobble? I’ve seen a lot of extender arms at scrimmages succumb to that.
(By the way, Looks awesome) 
She’s as steady as can be. We held a tetra out as far as we could, horizontally (12’ in front of us) , and the arm didn’t bend at all. It didn’t tip over either.