Author: kdk ★2017
Date: 2011-11-16 23:47
The X series is, I think, an early one. I bought my B-flat 10G, also an X series instrument, from a batch Gigliotti had in 1972, so it should be well before Morgan came on board. The wax is there probably to repel water to keep it from filling the hole, although you don't normally use wax that way on the large tone holes in the bottom section, and there shouldn't be that much of it, so maybe it has a less deliberate origin. I would have a skilled tech look at it - I own two of those early 10Gs and have played several others, and I don't think that your stuffy F is the result of a design flaw, so something may be wrong somewhere. Undercutting may help as a last resort, but it may make the note sharp as it clears the response up (you said that it's in tune as it is right now).
Of course, if the instrument is from the early '70s, there might be some kind of change going on with the bore itself, which will need to be dealt with by a very skilled mechanic.
Karl
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