yeah i guess its a dud design.i bought after reading articles like 'best rtas of 2019' and utube reviewers swooning over its flavor. my ofrf gears miles superior on flavor. thats the only other tank i have. i think im going to get a single coil rda an drip from now on. or should u use 2 coil rdas ?dont want spend £20 + again tho. one known for flavor not clouds. i have to admit i only used the zeus in single 4mm mode.was a mare trying to get 2 coils heating in balance.suppose i should drill a cpl holes in a bit of ally 6-7mm thick so i can get even leg length,an try again. to be honest i find anything less than 20mg too frustrating for words ,i only vape for nicotine....with flavor.