Jay (or anybody else),
I've built three pipes, and they seem to be coming out alright. I was looking through your old posts on pipe making (123, 24, etc.), and you show a picture of the four sides glued together, with the bottom and languid glued in.
My question -- the plans seem to call for the languid piece to be installed with its top surface 3/4 inch from the bottom. When you account 1/8 for the bottom piece, 1/8 for the languid, that's 1/4 off the 3/4 space I started with. Net, the little "compartment" where the air inlet hole is drilled is just barely big enough to accept the 9mm hose hole called for in the plans. In the photo in your post, it looks like there is a lot more room in that compartment.
Am I right to go ahead and use the plan specifications, and assume that the tiny space is right?
Thanks.