Just my opinion...But you might want to rethink your decision about the UltraMax, as you can get much better for a lot less. I bought two UltraMax kits less than a year ago, one is in the trash and the other has a broken ceramic RES (second time) and is pretty much useless, and I'm now using a ProVari with a carto/tank that I got from a friend. The ProVari is MUCH better.