You may want to check for any inconsistencies between all other glyphs to make sure all common elements are the exact same, for example, check if all instances of the flat sign has the exact same curves.

Here are 3 examples:

I found that Glyphs 170 + 171 (the flat signs with a(n) up/down arrow) have a very slightly different curve in the inside of the right side of the flat symbol.

Glyphs 242 + 243 (64th + 128th rests) have an inconsistent corner where it should be rounded

Also, Glyphs 290 + 291 (Triple/quadruple forte) have different curves on the 3rd "f".

I don't know if these small differences are to balance the glyph out, or if they're an unintentional difference that needs to be fixed

Just rewatched your amazing YouTube vid on how you are making this font, and figured i try to contribute a bit by pointing these small differences out!