Quoted from Shogun00:
Interesting! What brand of LEDs are you using? Are you using a LED OCD rely board?
GI flicker is a know a problem with William's multi-level dimming GI relys. There's quite a few threads on this board on it. Personally, I don't notice the flicker much unless I look at the back box while pressing the flipper buttons.
As for the ramp, what incline is your machine set to? I have mine set at floor level (5.5 degrees), so perhaps I need to re-level my machine.
Probably pitched at 6.5 or whatever is standard. It isn't super steep or anything like some people do. 5.5 sounds low, i'd crank up the rear legs a bit. That's how their designed to be set up.