I have an dual 18650 Unregulated Box Mod running in parallel. Have any of you members ever use a tank on ur unregulated boxes? I have an aspire atlantis tank laying around that i tried on my mech and was not very pleased with it. (I know tanks are meant for regulated VV/VW devices.) Would think tank work better on my box mod? Im happy with rda's just want to know if its worth buying another coil for it.