Bob, I'd like to add what IMHO is a very important variable: 5) the consistency in the removal of the old tuningpins. I remove tuningpins with a drill and try to do it as fast as possible. When you do it fast with a heavy drill and a steady hand, the tuningpin is only a little warm. When you do it slow and with a tuninghammer, the tuningpin will be very hot. You can imagine what different effect this has on the hole. There will also be a great difference in side movement of the old pin, while beeing removed. Michiel van Loon mvanloon@xs4all.nl Meppel Nederland >Rob - I've used both reamers and bristle brushes. I prefer the brushes. >I used to buy them at an ammunition supply, then some piano supplier(I >forget who) started selling them. One thing to remember is that there >are several variables: 1) the consistency of the original drilling, 2) >the consistency of diameter of the original tuning pins, 3) the >consistency of the replacement tuning pins, and 4) the consistency of >your reaming of the holes. After measuring several sets of tuning pins >some time ago, I discovered the discrepancy between the real world and >the ideal world. In the ideal world, 0.286" is really 0.286". In the >real world, one 3/0 tuning pin may vary as much as 0.004" from another. >That's just one variable. When you start to multiply the variables, you >can get quite a range frome tightest to loosest. This is not very >reassuring, but the main thing is that the better you can control the >variables, the more consistent result you can achieve. > >Yours, > >Bob Anderson >Tucson,AZ >
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