Oops, sorry, sent that last one accidentally without posting anything! > Prior to 1992 the action spread was 112.5 mm. I really just guessed on the age - I forget when it was made. I gave Phil Glenn the serial number and he said this one was a newer one with the spread to be set at 113.5 mm. I also have one in my shop for brackets that is from the '80s, and you sure are right, that one gets a spread of 112.5 mm. > With the shank horizontal, that would be theoretical string height. > Subtract your l/o distance from that. > Just for fun, assume your string height as derived above. > Measure hammer center height > measure hammer blow > Hammer Center Height + Hammer Blow = String Height > By manipulating this equation you can ascertain whether the brackets > require a shim underneath. You get your theoretical string height from the horizontal shank, you subtract blow distance, and you get where to set the hammer line. I don't understand how this will tell you about shimming brackets. Maybe its because I'm not sure exactly what "Hammer Center Height" is. I set my bracket height by getting the two end brackets at the same height (after first making sure they were the exact same size), and then using a straight edge to set the two interior brackets. Although, this method does not necessarily set the overall bracket height at some optimal level - it just gets them the same and all in a line. Please explain more about how you determine optimal bracket height - and really, rail height. > Don't do much key leveling/dip work out of the piano. I do, but I also understand your point. Sometimes it works well, and sometimes I am disappointed. > Jon Page Terry Farrell
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