Hey Paul   I like these pianos tonally but the action guys ...what were they thinking?  Here is the short version.    Nice action ratio. Its 5 or 5.3 to 1. Then they shot themselves in the foot by installing hammers that weigh over 1o grams in the bass and on into the trebles. SO they over powered the action ratio with hammer weight. Then added lots of lead and maybe a wippen assist spring and viola ....an action that's heavy aaaaand there's no up-weight either.  Solution :....remove hammer weight or install new lighter  hammers. Then with the hammers lifted out of the way.... weaken wippen springs till the weight of the wippen is barely supported, Or just starting to show that it wants to rise.....then re-weight keys with springs engaged.  Now it works <div> </div> <div> </div> <div style="clear:both">Dale S. Erwin www.Erwinspiano.com 209-577-8397 209-985-0990 Ronsen hammers/prep Sitka Sound boards Belly packages </div> <div> </div> <div> </div> <div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message----- From: Paul T Williams <pwilliams4@unlnotes.unl.edu> To: pianotech@ptg.org Sent: Wed, Jun 29, 2011 9:30 am Subject: [pianotech] Petrof grands <div id="AOLMsgPart_2_36aec71c-4b5a-4019-8c25-420746130703"> Hi All, What do you folks think about Petrof Grands?  We were just donated a 1985 6'5" Walnut Polish grand.  It's been maintained extremely well, but is about the heaviest playing piano I've ever come across.  I've never worked on a Petrof grand, only a couple of uprights in my 20 years in this crazy business. It was delivered to my shop this morning and will probably live in our University's "welcome center" lobby, so only played a few times per year.  It's really heavy and built like a tank like old Mason and Hamlins.   I'm considering trying the TouchRail system from PitchLock Co.  Has anyone tried it out? Thanks Paul </div>  </div>