Yeah, tried that, shoving a metal jig into the coil when pre-firing, but it sparked and/or 'too low resistance'. 'Duh' moment for me, I'm basically shorting a circuit. It only became possible to do that with a ceramic jig that's non conducting. Successfully done it with my current setup, 24 ga, 10 winds on 35 diameter. Without shoving a jig, pre-firing would just cause both the end wires (the ones connected to the poles) to glow bright, and then snapped off. With a ceramic jig in the middle, it pre-fired slow but nicely. Tried with dropping water a bit, but the water ended up boiling and shoots at my fingers (hot!). I was using an empty liquid bottle as the water container and dropper tho, so maybe the water drops from the nozzle were too big.