yeah think you got the general idea I used a brass threaded ring that glues into the top of the bowl that a brass cap incorporating the switch screws into. the bowl had to be bored out larger to take the battery and slightly deeper.
the neck was then bored to enable the atomizer to fit inside. wires were attached to battery connector with approx 10mm of battery casing . a spring was soldered to the ground wire then this was glued into the pipe base and the spring glued into the bottom of the bowl with epoxy and the positive wire soldered to the threaded ring.
a 901 cartridge was then cut down and the pipe mouthpiece bored out to accept this .
the two halves will now go together but i also added a brass ferrule as a joining strengthener with a key to hold the mouthpiece in the correct position .
have found no need for a additional air intake hole for the attomizer it seems to get enough from around the joints
Thanks a lot Rob, Maybe you make a little little hole to the neck of the pipe, only for better air for the atomizer? Maybe more smoke?