Hi folks,   I recently acquired a used Rochelle, and I have noticed a few issues with the left hand side.   One is that most of my left-hand keys produce a faint buzzing on both push and pull. I am not sure what is causing that, but the waxed in reeds make it a bit hard to investigate for me.   The other, which I think is unrelated, is that air is audibly leaking through somewhere on that side and stealing my bellows travel. It is most noticeable when I extend the b