Additionally, there's also the rigid sostenuto tabs (as opposed to hinged and spring loaded) on the old ones that can be noisy with a certain kind of pedal release. Plus serviceability. If something goes wrong with an underlever on the old style where the levers are glued to the rail, you need to remove the entire back action to repair it. On the new ones, you can simply unscrew an individual underlever and take it out. David Love davidlovepianos at comcast.net www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Porritt, David Sent: Monday, May 12, 2008 4:01 AM To: Pianotech List Subject: RE: replacing a back action on a 1909 Steinway B Yes, for some time (I don't recall the years) Steinway made back actions where the damper lifters were short (these are now affectionately referred to as the "short arm" underlevers). That made the angles steeper and they tended to dig into the lifter felts on the keys and made divots. Replacing the entire assembly is really the best course. The other reason I've come across is simply cost. It is frequently a savings to replace the assembly with new well-bushed, parts than to do the rebushing, repining etc. of the worn ones. dave David M. Porritt, RPT dporritt at smu.edu -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of John Delacour Sent: Monday, May 12, 2008 2:02 AM To: Pianotech List Subject: Re: replacing a back action on a 1909 Steinway B At 20:13 -0700 11/5/08, David Love wrote: >With back actions it's best to start with something not premounted since >modifications are more the norm than the exception. That puts my vote >toward Renner. Can someone explain why one would fit a new assembly rather than restore the original? JD
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