Robbie, I feel that an "after-market" stack such as you suggested or from
another company in California is an excellent solution to this problem.
Unfortunately, the customer doesn't!

I have done some "build-ups" with those systems at the request of clients
but I must say that I am not sold on the quality and durability of the
parts.  This customer has installed one of the build-up kits, himself, in
an old upright he owns.  I guess he wants to keep this piano with
original parts.

Debbie

 [ I understand.  Anyone got a Simplex for sale?!  -- Robbie