Hello Ron,  If you are seeking information for the piano Concertola,
there are a number of drawings posted in the MMD Archives, at
http://mmd.foxtail.com/Tech/Concertola/index.html

The drawing set is incomplete but it does contain a lot of information
if you look carefully.  I received these already-photocopied drawings
from Terry Smythe who, to my knowledge, does not have originals, and
I scanned and posted them on MMD a number of years ago.

If you seek information for the organ Concertola, I have some very
poor blueprints and, again, an incomplete set.  I have scanned them for
others in the past and can do it again, but I have to repeat they are
of _very_ poor quality.  Nevertheless, if you don't expect miracles I
can re-scan them for you.  They will be big files and not very helpful.

There are many differences between the piano and organ Concertolas.
Not everything made by Aeolian was reliable, either.  One thing is
certain: Concertolas have attitude.

Jim Heyworth,
Sechelt, B.C., Canada