Just got a new horn as a gift -- never had one before. It is already assembled. The only question I have is the stopper is a little too long. I am planning on cutting and shaping with a dremel to make a nicer fit. Wanted to get ideas before I go ahead. Should the stopper fit fairly tight to horn, as far as right up to the large part of stopper? Also, once I have refit it, is there anything I should do in particular to protect the bare wood of stopper. Coat it with anything? Appreciate any help.