I just wanted to finally post a mini review of the WPA, my impressions of which are very positive. My new, warrantied, atomic-box as I've been calling it is much hotter and more satisfying than my old school model. The learning curve for noobies has been much reduced, hits are far larger, and the MF+WPA has been unleashed as a truly viable vapebong apparatus. Even very small loads work great, providing dense vapor with even ABV with some discipline and of course the occasional shake and mix. But even with the stem and with no water, I can get hits which actually rival the Solo in density, and with noticeably better flavor.
MF has been great to me and deserve credit, both warrantying my old box and giving me a free WPA. Thanks guys.