I'm having a time building the Diver 2. I got some premade resistance/ no resistance 2 ohm wires after trying just resistance wire with no success. I built a nice coil around double 2mm silica, as recommended. It measured out to 2 ohms perfectly in my tester. It worked well IN the billet box juice reservoir when I installed it on my ego battery. Worked very well. Cleaned out the billet box contacts and installed. Nothing. Doesn't fire. Seems like a loose fit, but it did tighten. This is after 2+ hours attempting to get a good build. I am quite experienced with building coils, I've gotten some of the most notoriously difficult attys to work fine in less time and effort. I've watched the videos. I went back to the bridge, which works OK.. I'm frustrated and disappointed.