This is very accurate, great job! However, I have a little detail to note: when you're porting from other SNES games, if they have a different master volume value than SMW's ($7F), you have to adjust the echo volume to account for the difference. In this case, instead of $4F $4F it should be $6A $6A. It's not very noticeable unless you compare the songs side by side though, so I don't mind it.
Also, I had to lower the global volume to w140, as it was a bit too loud in-game.
Edit: Oh, I almost forgot! Make sure to add some tags to your port from the list in the submission page.