They're the same exact Sanwa OBSF 30mm buttons that came w my Hori SCV stick PLUS an added thin, padded washer under the button to supposedly make it quieter. I think because when I use Yoshi and I'm mashing for his doorknockers and ear slicers that I'm just going to be noisy on any...
Hey Wolf, came across this after watching your LS playthrough - you handled yourself like a champ compared to this dude! http://www.youtube.com/watch?v=-0p3iNaFfOA