I can import it without fees as well being NI is still in the customs market from that Verdampnochamal site in Germany. Otherwise its seriously expensive but ive tried and tested and my conclusion is you can have the most fancy glass and heaters but the most critical component is the bowl and its capacity alongside what the basic materials
THC content is. So a massive bowl and oil being obviously the best you could achieve in theory. Flower only seems to extract 5% or so of a bowl for me anyways on each bong ful so its maths which i failed that says if you want a big potent amount of vapor then your base 5% must be large.
There is no larger bowl than the Verdamper it holds what seems like 1.0 grams and there seems to be about 40 bongfuls from said 1.0 grams. Its very efficent and hard hitting and the taste is exceptional.