Hi Manfred
I have just measured the things you asked for:
1) The upper vaporizer #153 measures 129,5 mm not including the nipple (This measure is taken from the bottom of the screw when it is mounted to the lower vaporizer. I did not unmount it because i fittet it with muffler mender because is was a bit untight. Hope you can use the measure anyway - if not write again and I will unmount it)
2) The mixing tube has the following measurements: Inner diameter 13,8mm and outer diameter 16,8
I am currently making the threads on a new 500cp mixing tube higher because I want to mount it instead on this lantern. The reason I want to do so is because it keeps on burning too rich even wit a distance of 18mm above the nipple.
Are you having some of the same problems or..??
Kind regards
Casper Falden