So I recently bought a Conn 12m (it’s from 65 and is Mexican, ik it’s not ideal but I needed to buy one before I go to college). I was wondering some of the notes are a little airy/not as much punch. Any tips for me to work on this? I tend to be very sharp on this bad boy as well any tips? Also it was recently repaired and plays pretty well still getting used to the different key lineup though!