My all day setup is a subtank and a sigelei 50w oni edition. Dont worry i dont drip and drive im one of the few that dont like drippers to much effort needed to vape. Far as driving with knees im very good at better than miss daisy driving next to me two hands on wheel looking through the steering wheel swerving into my lane. But i know its not the best practice to do but i only do it relax im fully watching the road.