I was thinking of making a ball handling system.
I've drawn some plans on paper, tested the thing in a physics simulator on pc, and it seems to work.

But I was wondering one thing.
I want to make the system so that the balls don't start refilling every time you win like 3 balls. Because then the whole thing would rattle continuously, the ball lifter would go on / off / on / off / on etc.
So I made the system so that first 500 or so balls can be won before the refilling starts.

Do you guys thing this is worse / better for the ball lifter motor ?
Or how it would do with the noise the whole system makes ?

One last question, I once saw here a system for 5 or so machines. It had a central ball reservoir with rectangular pipes running sideways of it.
The front of those pipes was transparent for allowing the owner to check for ball jams. And it had t he possibility to stop ball flow by jamming a card in between.
Does anyone still know who's system this was and has a link to it?
I thought it was compirates', but after looking through different searches, I couldn't find anything.