Author: Philip Caron
Date: 2018-04-04 22:50
If it's F4 to F3 with C5 in the middle, then "if it were me" the problem would probably be my left index finger failing to close the top hole. This tendency might not appear on different keywork.
Is the ring around the hole a little high, i.e., do you have to add pressure to push it down? If so, perhaps the cork in the linkage is getting worn, or some other adjustment might be needed.
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