The other question is how to use the tool. Should the key be eased differently on the longitudinal axis than the latitudinal axis? Do you just insert the tool and turn it or is it more of a rocking motion? First you need to be sure that the thickness of the wood at the bottom of the hole is uniform by using a #3156 (same page--Jon Page has previously posted a way to index the thickness using that tool). Then I think the better way is to insert #43 tool from the top, turn the tool so that the wider part of the tool is perpendicular to the length of the key and then rock the tool gently from front to back so that the first ease is the side to side fitting leaving the front to back fitting for last if the key is still too tight. Personally I would like to see the #43 tool made as a one piece tool with a T handle so that the T runs in the same direction as the wider part of the working part of the tool. That way the orientation of the blade part would always be known once inserted by the direction of the handle. David Love www.davidlovepianos.com Hi list Is there a difference easing through the top of the key balance pin hole and through the bottom of the key? Have forgotten why? Lim Lim The correct way to ease the balance rail hole is with a Key Balance Hole Burnisher, (Schaff part # 43, page 43), inserted through the top of the key. The angled burnisher opens the bottom of the hole, but keeps the V shape of the hole inside the key, to allow the key to rotate on the balance rail pin. If you open the hole from the bottom of the key, you risk making the hole too big, which will result in a pulley key. (the key moving front to back on the balance rail hole) Wim
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