I managed to get hold of a steel drum of 120 cm high with a diameter of 51 cm (it is the inside of a coil of plated steel)

We went welding and cutting.
The smoker got 2 baffles inside for a better smoke distribution and this also enables me to use it as a cold smoker (with the proQ) and hot smoker (small fire inside, haven't done that yet though).
This is what we ended up with:

Inside the smoker are some chicken breast
And as you can see: I got a bit lazy when I got to the smoker lid, so I am just using the top of a webber (cheap imitation).