DGH9442@AOL.COM wrote: > > Having installed numerous PMM systems in both grand and upright pianos, I find > that it is much simpler to install the system in the grand piano than in the > upright...The caveat being that there is a dirth of room inside an upright > case...This makes the installation process an adventure in engineering at > times...One of the primary problems are the support "horns" that extend from > the plate under the keybed...These are usually in the way when you are > attempting to install the rail system, and they have to be refigured in such a > way to still perform the function they are intended for, and yet allow the > rail system to be installed...One can install the rail in the front of the > horns, but that moves the position of the rail solenoids forward on the keys, > and, in many cases, this causes the entire key to lift up horizontally, > instead of just rocking the tail of the key up and operating the hammer > abstract. > Good and proper installations are possible on uprights, but one must do his > homework first...Best wishes, and good luck... The plate horn you mentioned only supports the keybed, right? Just hack-saw it off and support the keybed another way. Bill
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