not sure if this was already posted but was cleaning a nes advantage I just bought and learned the JLF balltop was interchangeable so if you need a smaller ball top steal one from a nes advantage!
Pretty cool. When I was playing on ball top I definitely would have preferred a smaller one. Switched over to bat anyway.
Sanwa actually sells smaller and larger balltops.
Well they did last time I ordered from Akishop