I used to use a germinating tray with a lid and vents for ventilation. A heat mat set to 80 degrees, soaked rapid root plug surrounded in promix and in a beer cup myself. 2 day sprouts every time. I still have 100% germination rate doing it this way and direct to final pot but always used the root plugs that I cut down as small as possible to ease the taproots penetration to the soft soil.
I'm envious of your space and amount of plants you grow man. I'm shutting down shop besides the autocob 4x4 room till I finish the room overhaul. Adding a minisplit, fresh paint, new drying cabinet, better storage ext ext... I have gone through so many lights and different type of setups in here now and after a year + of growing in my dream room I realized it needs adjusting. I was trying to figure the minisplit size I needed for the room and at the beginning of last year I wanted a 24k btu unit, later decided on an 18k and now recently purchased a 12k btu precharged mini. All thanks to the cobs and their lower wattage. I am taking out 2 amares and running dimmable citizen 1812 custom rigs. Dropping wattage and heat load will be a huge savings on my 700$ per month electric bill.
