So I decided to open up the vents on my Brigham's this morning. First one went good. Second one, not so good. My newest pipe (had it maybe 3wks) My Voyaguer 'Acron' style bowl. Everything was lined up perfect, I start drilling and out the bottom she came :x I cussed a couple times, still bummed about it even now. It is a $38 lesson learned. I am off to pick another one up tomorrow morning, I just hope they have another of the same style. I really like the large acorn style bowl. Fits my big hands well.