Thanks for the compliment! I'll see if I can fiddle with the shape. It smokes like a chimney and I don't get a lot of time in the shop anymore (I'm almost done with my BA and I get to choose from MA programs if I decide to start this fall). So for a first try, I'm calling it a success- but I already know what I'll do different on my next pipes (shorter shank, for one).
Where did you get your stem? The stems I bought were very rough (the plastic from where the mold halves meet was still on them) and they're way bigger than I expected. I like the style you're using.
I did the hole a little differently than I've seen- pardon my imprecise terminology as I attempt to explain the process. I used one of my bladesmithing tricks for fitting full-length stick tangs. First I drilled a 1/8" pilot hole in the end of a 3/4" cherry-wood pen blank. Then I straightened out a coat hanger wire, heated the tip and burned the hole until it was about 1/2" from the closed end. Hanger wire is conveniently 1/8" diameter and you only need to heat that last 1" or so with a propane torch. Using a vise to hold the wire is good for your hands and acts as a stop, so you can't punch through the other side, if you're trying it my way. It takes a few heats but it's an easy process.
I shaped the shank so it fit the hole in the side of the chamber block, and then made a flat spot and rounded the tip. Once I established that it was all snug and didn't have any gaps around the sides, I drilled a 1/8" hole at roughly 45deg to the main bore of the shank. I used the same hot wire trick to extend the main hole and this side hole until they met.
The burned out pilot hole was also the guide for the bits that I used to seat the stem.
I must have done something right because I ran a pipecleaner through the stem and shank and didn't hit any snags.
The thing I hate about cobs is the way the shank is inserted- it leaves gaps in the chamber. Plus the airway is HUGE and the cutoff end acts as an ash scoop. By the time I get to the bottom of a bowl I'm sucking in more ash and cooked tobacco than smoke. So this is kind of a hybrid cob and brier junction. I've smoked two bowls with it and only had a little bit of burnt something in the first bowl- it could very well have been charred cherry wood, but I spit it out all the same