I have had several that hadn't been smoked in a while and I tighted them by holding the tenon in boiling water for a couple of minutes and letting it cool before inserting in the shank. One was stubborn and had to go back in the water for 5 minutes. All good now. Any changes to the wood will be temporary. It's very strange to see a Savinelli with any kind of problem. I've had a couple of artisan pipes that had tenons that were too tight too.