Hi, sorry if this is an obvious problem, I've just started making pens -well haven't made one yet. I've made a blank drilling jig and glued the brass barrels in, but they don't seem to want to get on the mandle, got one jammed half on before it pushed off the wooden blank then it was a difficult job to file and then sand the barrel off. Is this common? it's so close to being the right size but not quite, am I missing something here? or do I just throw away the 10 pen sets I've got and buy better ones. Thanks for any input you have