Shave_Rat, there are a few very simple quick fixes that can be performed on just about any pipe with a gurgle to clear it up.
If the gurgle is at the tenon (caused by either a gap between the facing of the mortise and tenon, or by a 'step' at the join, causing turbulence), simply take a counter-sink drill-bit, and using a t-handle (don't use a power-drill!) taper the facing of the tenon, much like Peterson does.
If the gurgle is in the bottom of the bowl (the airway is drilled high), simply create a putty of cigar-ash and saliva, apply to the bottom of the tobacco chamber, and allow to dry.
If the gurgle is in the airway (caused by poor drilling), take a very small drill-bit (I use a #13 - 0.182 to a #29 - 0.136) and once again hand-turning, simply widen the airway a touch. There is a caveat, however, when performing this on bent pipes. Ensure that there is enough material to do what you want to by holding the drillbit on the exterior of the pipe, following the path of the airway. Some of the thinner-walled factory pipes (Medicos, for example) are engineered so close that widening the airway can destroy the structural integrity of the shank.
Thanks, it seemed to be at the bottom of the chamber, so I'll save up some ash and try that. Thanks
Pipe-tobacco and sheet-tobacco (cigarettes) don't burn thoroughly enough to make good dense 'mud', and pipe-tobacco ash will often carry residual flavours for a few bowls from the toppings and casings. Cigar ash is usually recommended (cheap gas-station cigars work just fine, doesn't have to be a twenty dollar Cuban), although I've heard reports of people using the ash from charcoal briquettes with spectacular results (one of these days I'll try it, but for now, I don't start burning charcoal unless I'm cooking, and as much as I like BBQ, I don't really want my smoke to taste of it).