About the turbine suction units overblowing: I once was called to an
antique store in the Vieux Carre' to investigate a Weber Grandezza
that was smoking. It had been restored somewhere "up North" and
played beautifully for a while until it got a whiff of our humidity.
Turns out the restorer had added a suction unit placed between the
back posts on the rear of the piano to augment the instrument for
some reason. With our "steam bath" weather of the Gulf Coast, the
instrument tightened up and didn't need the extra suction. In fact it
was so tight, the suction blower might as well have been bunged up!
So it was removed and no problems... unless it went back up North!
Mr. Berley Antoine Firmin II
Bayou la Combe, Louisiana