@grokit, thanks. As you say there shouldn't be any problems. One size fits all.
@david8613 I'm expecting an M to arrive any day so I can be sure, I am keen to see how much heat transfer there is with the all SS construction.
But for now here's some pictures of another segmented stem I got done today in between conversations with people on the other side of the planet.
The case of the wondering drill, Thuya burr and a 5mm hole.
Looks good from this end, but not so the other
Put together like this and the ends won't pull together properly, so it's back to the lathe on a custom mandrel to square it all up.
My new favorite piece of tooling, a collet chuck. This allows me to take pieces in, out and turn them around at will with out any concerns of it not centring again.
Second picture is the 'hot end' getting a thread put in it. The MP gets the same treatment.
Collets go from 2mm to 20mm so a quick swap and the condenser goes in and gets threaded.
Condenser gets screwed in to the Blackwood, brass and Thuya all go in place
and it all gets screwed together, you can see the PVA which I've had to use so it all just doesn't spin when a chisel is offered up to it.
Turned and squared, but it's not for public gaze just yet, nice surprise for the lady it's destined for.