Well. I didn't see anyone else mention this here, so why not. A common training technique in music when learning a new song is to practice with the metronome at 1/2 or sometimes 1/4 speed until you can flawlessly play the piece without error. Then once you've mastered it at 1/2 speed, move on up to 3/4 speed... then 100%, then 150%. If you can do it at 150% well, 100% will feel like cheating.

Personally with this game in particular I've been struggling with bomb jump timing, refill glitch, and jbj timing. Fortunately Bizhawk is has the 50% setting so I apply the same technique I use when learning a new song on the piano: 50%, 75%, 100%, 150%, then back to 100%.

And now Kraid [the area, not the giant monster] is less painful in the 100% category. I still am very very happy when I exit Kraid.

I hope this helps someone. Cause it's definitely helping me. Anyway, back to practicing. Good luck everyone.