[G Fawkes]

We got our prototype shooter running Sat night and hit 5 out of 6 3 pointers in following configuration;

20 ft
Shooter at 25 deg
Two RS550s on 1:1 versaplanetaries
2 7/8" blue banebot wheels
10.5 in compression with top plate
Stationary rail was a painted 2x4
The discs were still rising as they passed through the goals.

Couple of interesting observations;
On our first setup the plates the gearboxes were mounted to would flex. Made quite an improvement to hard mount the gearboxes.
The top plate made a noticable increase in performance when we reduced the compression distance to 10.5"
Tried some 3 7/8" wheels and there didn't seem to be a noticeable difference in performance.