My motto with any hobby/interest has always been: Anything worth doing is worth overdoing.
Plus I already have the variac downstairs. It would give my vape station that Dr.Frankenstein's lab-bor-a-tory look.
Also Andy, I wanted to praise the nano for another reason. Last night I was vaping some oil soaked cotton with the nano and a gong. I didn't notice that after my last hit the cotton had gotten stuck to the heater grate and was pulled out of the gong. I just realized that the cotton was stuck directly on the heater since yesterday and was darkened where it was attached but not burnt. This could have ended much worse with another plug-in device, but the nano, set at 6.5, did not burn the cotton. While I'll try not to do something dumb like that again, I continue to leave my nano plugged in 24/7 with confidence.