I am having trouble getting the pins tight on my wapi that has been re-scaled with wood. They just seem to get looser and looser and I can not get them tight no matter what I try. I have been using a ball peen hammer and a large hammer for an anvil. The pins are so loose it is hard to strop without fear of cutting the strop or dulling the blade. Is there anything I can do to get these pins tight? Could it be that the wood scales have something to do with it?