Strikes me as more work by far then using jiffy leads for a temp change. Adding leads to an upright hammer assembly has not been suggested by anyone as far as I can tell. Tho to a grand it is perfectly acceptable if your purpose(s) fit the bill. Yes it affects the tone as well as touch. Sometimes thats exactly what you want to do. There is no way a repetition spring is going to break from any reasonable amount of added weight. Hammer radius weight in the past has been at times absolutely gargantuan with no reports of repetition spring breakage. Of course there are reasonable limits to what hammer radius weight can be... but I doubt seriously this is connected in any way to repetition spring failure. Cheers RicB I have no intention of removing or adding leads to the keys only to have to undo the work at the end of the hire, so I am fitting polyester cord loops under the keys just forward of the pilot boring and long phosphor bronze springs inserted into the front face of the backtouch rail will pull down on these loops to increase the touch weight. Adding weight to the hammer assembly is no way to increase touch weight, since it not only affects the tone but also increases the work required from the repetition spring, which can break as a result. JD
This PTG archive page provided courtesy of Moy Piano Service, LLC