I have done this... under duress, and knowing better. While working for a large dealership (that was also paying my salary), I occasionally had to do this when said dealer refused to buy much-needed replacement hammers on trade-in pianos, and the existing hammers were too short to permit regulation (proper or otherwise). Note: this 'operation' was usually performed on the same pianos that were painted white before being put on the sales floor. Since the keyframe is "fixed" at the front by the key blocks, the keyframe will pivot on the now taller glides and rise at the back. While keyframe strength does enter the picture, both the strength of and the amount of rise are governed by the dags. If excessive, either the dag or a chunk of the keyframe will break off. Otherwise, the limit indicator for this 'scab' operation will be a noticeable increase in the amount of friction while shifting the action! Jim Harvey, RPT ____________________________ Reply Separator ___________________________ I have heard of some very respected Techs who will set the glides a little extra deep to increase dip and after touch. My question is how far can we go with this? Assuming that the glides are set correctly in the first place, would an increase of 1.5mm key height be too much? What are the dangers of doing this? (Please don't tell I'll know I've gone too far when I have buried the hammer flange screws into the pinblock) Does the brand of piano make a difference? (i.e. sturdiness vs. flexabilty of key frame) How does weather changes affect these setting?
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