Coin pusher GBC

[howitzer]

I've dabbled with GBC before but beside my earlier GBC contest entry, this is my first serious attempt in creating a GBC that would also be suitable for shows. The inspiration comes from coin pusher arcade machines but instead of coins I would obviously use GBC balls here. The intention is to run the whole machine with a single motor.

At the moment I'm building a prototype where I try to figure out the basics of the mechanisms like gearing and also try to figure out the relative positions of each part and how they connect to each other. Here's what I've done so far:

So the balls feed into the box at left, then enter conveyor belt guided by the rails and when at the top they would be dropped on to a nearly vertical board with pins, bouncing to the bottom where the back and forth moving levels (assembled on the top of the rack gears) make the balls drop further over the ledges. Considering the height requirements to comply with the GBC standard, I will probably need to add another conveyor belt or other mover to get the balls up high enough for the exit.