Quoted from PinScott:
From what I understand, the left wireform is being modified to prevent a ball from being trapped near the exit.
Indeed its an issue. I had it happen about 10% of the time. The loading of the windlance is a rare, shot, so it didn't interrupt too many games - but its an obvious trouble spot. (I didn't have any other ball traps, except for a temporary one under a beast trap door).