I'm not sure where to post this question, so General Discussion will do. I want to know if anyone makes an inline wattage meter for a pv. I have a volt meter and I want to try to keep track of watts b/c I hate when cartos/attys change their resistance with usage and you burn the juice and it doesn't taste good once you get that burnt hit. I don't want to constantly keep taking off my carto or atty to check the ohm's. I know the Darwin would be prefect, but I can't afford it. I also know that the Provari checks resistance, but I can't afford that either. I love my Foxy Box mod and I would be set if I could get an inline watt meter. I don't know if anyone sells or makes them. Please let me know.