Hello,
All my parts have arrive

(
http://negnegneg.blogspot.com).
I really wanted to buy Sanwa buttons but I'm using 18mm (3/4) mdf and feared routing too deep might cause the mdf to be too weak. So I bought competition pro's (convex as that's the style I wanted) instead. For my side pinball and coin/control buttons that I wasn't bothered about I bought some cheap IL buttons.
In comparison the IL's are so much better.
My issue with the Happ is there is so much play between the plunger and the surround it's unreal, there must be 1.5 to 2mm and when you press you get a slight sideways wobble as well.
Why didn't anyone tell me Happ are so crap

I'll know for next time and won't be recommending these to anyone.
On the plus side, I think I bought good with the LS-32's, they're just lovely

though my only minor worry is you can't screw the ball top tight, it just goes to the end then spins on it's own. I'd have preferred it to be tight.