As I mentioned in a previous thread, I'm thinking about customizing a Hori Fighting Stick 3 with a bat-top Sanwa joystick and some better buttons. The thing is, I read that Sanwa buttons use a 30mm mounting hole, which translates to about 1 3/16", while a standard Happ button uses a 1 1/8" hole. The reason I'm asking about this, is that I would really like to use concave buttons in my HFS3, since that's what I'm used to. I know that many fighting purists will swear that the only way to play is with a ball top joystick and convex buttons, but my personal opinion is that it's all about preference, and bat top joysticks and concave buttons are what I grew up with.
Another thing that may be a bit of a bother is that the Happ buttons have a longer shaft than the Sanwa style buttons, and I'm not sure how much space I'll have inside that little HFS3 box. The ultimate solution would be to simply open the bugger up and test fit some buttons I already have, but it's always nice to know if a road is a dead end before you drive down it, especially since test fitting the buttons will require de-soldering the PCB from the buttons. The main thing though, is knowing wether the buttons will fit. We're only talking about a difference of 1/16 of an inch, but if that's enough to keep the button from mounting sturdily I'll have to start getting creative, or (grudgingly) learn to use convex buttons.