So i purchased a Subtank a few weeks back and it was great at first, but recently i noticed that the resistance would jump on my ipv3. it's now doing this in OCC mode and rba mode. It will jump from .6 to 3 ohms and everywhere in between! I thought it was a problem with my IPV3 but i put it on my Sig 100+ and it still did it. I put other attys on both mods and the resistance stays put. I purchased the subtank mini today and have had ZERO problems. So i can only attribute this to that stupid spring loaded 510 pin on the 25mm Subtank. I tried taking it out and sanding both ends on the pin with fine sandpaper. I tried putting the pin in backwards. I tried using the beauty ring, still jumps. Hell, I even took the 510 pin out of the beauty ring and put it in the subtank base, but unfortunately it's not long enough to make a connection. Anybody got any ideas?