New Ball Lift Design by Rockston Engineering !

[compirate]

パーラー製å“�情å*± | Good luck. Good life. SANKYO

I hope I'm not coming across like your system won't work or there's only one way to do it.
Hoppers, high or low have the same problems, mainly high vertical weight (balls on top of balls) has a tendency to jam. The hoppers on the bottom are spread out to help alleviate this and the upper races that feed the machines are only a single layer of balls.