I cut out the slot for the reloading handle to travel in tonight. This handle will rotate the ball-catching tray (this needs a better name) up from near-horizontal to vertical, at which point the player will slide it up to the top, Sliding it up to the top will run all of the balls back into the magazine to prepare for another round of play.
I did this by cutting 1/4″ holes on either end of the slot, removing the blade from the scroll saw, putting the blade through one of the holes, then reattaching the blade to the saw.
Anyway, here’s a picture: