To insert a temperament strip, I bought a tool for that purpose - a burn-in knife (also doubles as an occassional glue applicator). Why don't the supply houses scrap the FELT strips and give us tapered CLOTH in long and short lengths and two thicknesses? A strip that works in the middle of a grand is too thick for many treble sections. Combining the wrong thickness cloth and a thick screwdriver blade could change your string spacing. I don't remember seeing this pitch altering technique in this discussion. For large changes, us no mutes, no strip. Tune one string while ignoring the other two. It takes some practice and a little courage the first few times. I use each of the four tones on an Accu-fork to tune unisons, octaves, fourths, and fifths. Carl
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