Thank you for the replies everyone. I am probably going to go for the two port Mayflash adapter. The Raphnet stuff does look higher quality to be sure, but it's also double the price and on back order.

@erk005 if you have a wiimote to plug the controller into to have it wireless, the mayflash dolphinbar is freaking awesome!! For wired the raphnet-tech adapter mentioned above works great. I have two of them i used before i got the dolphinbar.

@jcrod1000 Ask the seller ?

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Great idea, let us know when you're done with it.

@bobibrown Its in the integer scale folder in both 4:3 and pixel perfect sizes. I tried to make a crt one for full screen but it didn't look right

Every game on the snes mini runs perfectly fine on a pi EXCEPT star fox 2. SNES9x2010 runs some areas and a tad poorly with choppy audio and slowdown. Snes9x2005 runs it smoothly, but a tad too fast compared to a snes mini. Not that you would notice if you don’t compare. The pi has a rewind feature like the snes mini but super fx games struggle with it.

And now if you look at youtube the snes mini has been "hacked" you can now add all roms you want to it. so.. shrugs just up to you what you want.

@MrPrecise There are several forks from the orignal repo. But I can not advise which of the forks is the best maintained (as I do not use it actively), maybe someone else of the community here can provide a hint which fork works the best with a current RetroPie/ES.