This GBC Track Wheel Reservoir has the following spec:

At least 80 balls can be accommodated and delivered from the reservoir.

Up to 4 balls/second can be delivered (change the number of pegs
in the wheel or the motor pulley size to reduce the delivery rate).
I thought it was better to exceed the spec of 1 ball/second and then
reduce the rate, rather than struggling to meet the spec.

36 track links from Snowmobile 8272 or Bulldozer 8275 are in the wheel.
A 6-tooth sprocket is used to turn the wheel.

I had the idea to fee the output of this reservoir into my ball lifter,
which works best with one ball at a time on its input, rather than the
lifter having its own chute that might block.

An advantage of this reservoir is that the tracks are effectively the
bottom of the chute, so their movement prevents the chute from clogging
up.

Mark Bellis
March 2007