Speaking of the Savinelli 6mm adapters, I have occasionally thought of them in a slightly different light. Well, their operating concept, anyway. Since it is generally accepted that too much of a gap between the end of the tenon and the bottom of the mortise causes moisture accumulation, I have considered fabricating adapters to fill this gap in some of my unfiltered pipes. They would basically look like Sav adapters, just with a much shorter length and different outside diameters, tailored to the pipe they are to be used on. Of course, this is coming from the same nipplehead who is considering re-creating the Dr. Grabow pre-smoking machine with an air compressor, a very low PSI regulator, and an aircraft vacuum-instrument venturi, so take it in the experimental "what if" spirit!