Nice
I too experimented with this sort of thing.
I used a glass sherlock mouth piece
(18mm joint, DHgate) which happens to have a handy 'shelf' just below the joint which allows easy fitment of a screen.
I just loaded some herb onto the screen, then put a Milaana mouthpiece/stem (long) into the joint and used a Vapman torch lighter 'hovered' just above the mouth piece to provide the heat (pointed into MP)
Like you I found it worked quite well, and it was fairly easy to regulate the strength of the hit by moving the torch nearer or farther from the MP.
I left the single screen in the Milaana mouthpiece above the load, and I believe that it helped prevent combustion like your double screen does.
I did it as I wanted some idea of how hard/easy it was to control a vape like the Sticky Brick (nice and easy it seems).
This also proved to be a great way of 'cleaning' the Milaana screen.
The first time I tried it (no herb) I got a decent hit off the dirty screen!
Your metal pipe seems like it would be much less prone to breakage though! (and more portable)
Edit:
Quoted wrong post! so I removed quote entirely.