Hi, recently moved to vaping after 13yrs of roll ups. I won a nemesis mod ( real ). With a 18650 battery and charger. But no rba or rda so ive been having great fun just with my carto tank. Going to my local vape shop one of the guys there said I will ruin my nemesis if I keep using the carto and I should buy a rba or a rda. Is that true? Its not the prettiest set up but it works for me.