I have the screw in sanwas in my hrap. They fit fine.
I was just reading reviews on some Seimitsu screw ins that mentioned the screw in not fitting on the highest button slot on the HRAP Kai because its too close to the top panel, so they had to use a snap in for that one. Based on pictures, the screw in Sanwas and Seimitsus look to be similar sizes, so was yours a snug fit or did it require some prying?
Seimitsu buttons are less snappy/hyper responsive and require more "push" but they are really good imo.
Thanks, I'm definitely intrigued now. Anyone know how they compare to the Hayabusa buttons?