A couple of weeks ago I got a MM Diplomat which came with a filter. Figured I might as well see how smoking with a filter was like and left it in and gave it a shot. Didn't notice anything different from smoking my briars or my unfiltered eaton cob. Tossed the filter before my second smoke and ended up sucking back a whole lot of ash and bits of tobacco. I got a box of medico filters now for it to stop that issue. So my question is, is it possible to smoke a cob like this without a filter? Does the stem piece that protrudes into the bowl eventually burn away and stop this? Or should I be prepared to keep filters on hand for this pipe? Thanks in advance for all the help.