Hi Substring,
Thanks for replying - I was going to try and message you on github seeing as you seemed to know about it, but decided to just try these forums in the end.
Thanks, that's great - will do, and I'l report back. I hope I can get it working - I have an old ps3 controller that I can use if not, but the Xaomi pad is a really nice controller, outdated bluetooth aside - although the ps3's rather flabbier and imprecise feeling analogue sticks do make the N64 games that bit more 'authentic'