ball "fuel" hopper sorter

[JamesBrown]

I am sure some teams have, but I think you will be limited in how much info many teams want to share, this type of device/design will be a big differentiator.

I would recommend looking at some 2006 robots. 254 and 1114 (and their associated twins/triplets) had large hoppers that ran well without jamming. 217 also had a memorable system for sorting balls and feeding them individually, I heard it described as both a revolver, and a gumball machine, depending on your frame of reference.