That actually made me laugh out loud.
We used that design because we figured almost nobody else would use it and it would be pretty unique. Initially we thought we were a shooter so we ran those cylinders at 60psi. After realized we were really a hybrid shooter/dumper/thing we dialed them down to 19psi and stuck with that. It already makes a distinctive sound at 19psi, however when we ran it at 60lbs we would get a ringing sound through all the aluminum of the frame, similar to that of a tuning fork.
OP, to answer your question the only time we ever had balls get stuck on the cylinders was when we would chance upon a broken ball. Otherwise, the cylinders actually force fed themselves. When the cylinder's retract, the edge of the cup "grabs" the next ball in the lane, and pulls it down into the chamber, ready to fire.