I've been struggling a lot with executing the small jump to clear the Koopa and Goombas in 1-2.

After a lot of practising, I realised that I am pretty much incapable of executing a small jump when using my right thumb to press the B and A buttons.

I then realised that I can easily make the jump if I use my right Index and Middle fingers instead. It works well, and I am able to change hand positions before and after the jump easily.

Does anyone else do this? Is there any reason not to use this method?