hey guys just got my brother to quit smoking and actually bought him a decent set-up (or what I thought was a decent set-up). I got him a vamo v-2 and a protank2. after a couple of days the vamo wouldn't fire. I pulled out the firing pin and got it working again. a short time later it happened again. the store said there are known issues regarding this problem with the protank and certain vv mods. anyways the store is going to swap it for any other vv device I want and if I go with a more expensive mod I would just have to add the extra cash. ok, I have these choices/ innokin svd/ sigelie z-max ss/ tesla/ vamo v-3/ or the ksd k-max telescoping mod. personally I don't vape the protank and never have owned any of these mods so I have no idea, my question is, does anyone own one of these mods and also vape a protank on it and have absolutely no issues like the one stated above. thank you