I hate to say it, but honestly, both designs (this and the machine) SWIM's seen you post are...well, they're the sort of designs SWIM's experimented with very early in his travels, and he laid them to rest for very good reasons. They certainly work, but not very well in SWIM's experience. Admittedly, using a longer bulb as SWIY has here is probably a little bit better than SWIM's first bulb, but bulbs are a pain and will result in horrid vapors during the learning phase. The piece is going to be incredibly difficult to keep clean and will result in a good deal of premature precipitation. SWIM would say that as simple as these pieces are, they have a lot of overly complex nuances (nooks and crannies, plastic pieces, tape, and simply the manner of heating).
A bit harsh, but SWIM's been there, and would rather see SWIY take advantage of SWIM's (and likely others') experience in the matter than learn the hard way. Perhaps SWIY's experience will be a bit different than SWIM's, but he would bet that SWIY would continue to develop his methods anyway and eventually leave such designs behind, just as most do.