Hi Ragerio, Changing the F will have little effect, just go with what you get. Changing the A up one cent will stretch the middle section just a bit more. Changing the C down 1 or 2 cents will stretch the treble less. I get unhappy if I see F much over 12, but it does happen. I don't like A much of 8 but will not change it if it is, and I like C in the 5.5 6.5 range and will lower it if it is a lot higher. Also if I get any measurement less than 5 in F or A I will increase them some. If I get a C under 4 I will bring it up to about 5. Just plain practical tuning experience. Hope this is helpful. Newton
This PTG archive page provided courtesy of Moy Piano Service, LLC