I have tried using the tray to set underlever height, as suggested by Yamaha. I find easier when installing the dampers if the underlevers rest on a hard surface such as The Spurlock gage or the tool I use, a large dowel (hand railing with a bolt installed), it fits into a small space in my tool box. It saves me the trouble of constantly having to step on the damper pedal to regulate the dampers. Just lift the underlever with your finger and check with the gage. It might be an expedient way for a new factory install and probably is good for Yamaha style capstans where they will compensate for variations in tray felt thickness by aligning the underlever tips with a straight edge but too many variables involve in the field (different techs). Once the dampers settle, unevenly; it is far easier to tweak the capstan for pedalling than it is to adjust the underlever for regulation. Real world situation, set underlever to proper height; adjust capstan for even lift. And as David pointed out, just another extra step. But I can see the benefit to use this procedure to rough them in at the beginning of the regulation procedure. -- Regards, Jon Page
This PTG archive page provided courtesy of Moy Piano Service, LLC