So, I got some rubber pads in for my Super Nintendo pads.  Replaced the ones in my best condition pad.  Feels pretty good. The start and select buttons feel shorter than I remember. And the D-pad feels pretty stiff at the moment. But it's been so long I don't remember what they were like when they were new!

Overall it feels pretty damn good.

Got some thoughts about where to go next.  I'm thinking I may need to try region-free and 50/60hz switch before I get too far into trying to restore the shell.