I've been building up a rotation with a few new Dr. Grabow pipes, given my codger/blue collar tastes and budget. So far I've added a Grand Duke, Freehand and Royal Duke. I'm quite happy with the Grand, and I would be happy with the Freehand and Royal Duke but for a disturbing issue -- they leak noxious and finger staining tobacco juice around the stem and shank joint. Even when dry and clean and smoking a half-bowl of not-very-wet CH, the stem and shank joint will start "sweating" little brown droplets. At first I tried using the Grabow filters in the Freehand and Royal Duke (I normally smoke without them), but it had no effect on the sweating/leaking. Then I thought it might be a consequence of these Grabows not featuring a band around the joint (the Grand Duke has a band, as does my non-leaking Medico), but some online research revealed someone else reporting the leaking Grabow problem with a banded model. Right now I'm "solving" this problem by not sealing the stem and shank faces completely, leaving a millimeter or so gap between them. The Royal Duke's stem/shank faces remain dry this way; the Freehand develops some minor sweat but not enough to dribble. I have two questions -- is there a better way to prevent these Grabows from leaking during a smoke, and if not am I harming the pipes by leaving this little mortise/tenon gap while I'm smoking them? Thanks in advance.