Naw....just been growing indoors (and out) for a very long time and its habit. Being an indoor grower (especially back in the day when there were alot less of us) you pretty much have to know a little about everything that applies to growing but other "trades" as well....especially if you want to save money. Electrician work. Plumbing. Hvac. Carpentry. Etc....its not real technical. But if your not savvy with a screw gun..hammer...saw...duct work...wiring...it can get expensive calling up quotes from people that are. The whole legality thing was WAY different back then...and trust was seldom given to strangers. You did all this growroom construction shit yourself. Had to. That dont qualify as an engineer but it certainly does a general jack of all basic trades.