[TTech]

Very good, you described my fix better than I could. It's hard to tell from the second photo, that is the original diaphragm in the center. You did get me thinking of how the canning jar sealing lid might sound when used as a diaphragm.   

Showing my old time farm boy roots I'm afraid. Finding a fix with what I already have on hand. Only cost for me was the epoxy.
Keeping my fingers crossed.