Not sure if there is anyone, in particular, that I should sent this to but I did find a 'bug' in the pc board. Not critical as it was easily fixed but none-the-less should be noted.
Problem: the battery negative terminal is NOT routed to the 'ground' layer on the board. The '-9V' only goes to the Key Output jack and not to any of the other 'ground' connections (e.g. the U1-8 and U2-7).
Fix was easy - a short piece of wire from the 9V battery negative connection to the mounting hole/ground layer about a 1/4" away.
Now back to the testing.