My Bing is pre-filter era. But, in general, with other Savinelli pipes, I don't use the filters and I don't use the insert. Some of them smoke O.K. and some get wet from the turbulence that the screwed up airway presents to the path of the smoke. I have a Savinelli Poker that does O.K. without anything in that big hole. But, my 320 neither does well with the filter nor the insert -- it gurgles no mater what. Ironically, my Rossi 320, which cost 1/3 as much as the Savinelli, is a wonderful pipe to smoke. It has no filter and an ebonite stem. It is a really good smoking pipe. While Savinelli's are reasonably priced, they're not worth it to me because of the filter business.