Nah it's not tricky at all, check the BULLI thread. Last setup I tested I was able to get vapor under 5 seconds from cold using only 18W of power, and not even in TC mode. On average we work with between 20 and 60W max. Zion/Milaana are about 60W peak. S&B Mighty is 30W... (forgot to list that one and the Crafty btw, but it's hybrid convection/conduction and they are overpriced for so much plastic... at least that's my opinion) The problem was that previously the lithium batteries we had were not up to the task, but now with all those high drain IMR's it's easy really. And we're talking about like $60 of investment here, and some DIY skills of course, but nothing hard.