Ahhhhh, it's fantastic, lay in bed till the dog really started getting pissed off(7.30am, a 2 hour oversleep for me), rolled a fatty and went for an hour's stroll around the local park, now chilling with another fatty and a coffee.
I'd actually consider the draft a good thing in a cellar, my worst fears would be damp stale air. My first attempts at growing were in a small cellar, oh how I wish we had RIU back then. But still, after a steep learning curve, I found that basement growing is easier than in a bedroom or attic purely because it's easier to add a little bit of heat in the winter than remove excess heat during the summer. As long as you've got fresh air with good movement you should be good. When I next move house I'll be looking for something with a large cellar so I can custom build some rooms into it. I'm restricted to what I can do at the moment with regards to environmental control and this would allow me to get things really dialled in.
I do think it'd be interesting to see a side by side............BUT!!!! All the plants are from seed and are already showing different pheno's within each strain and the effort that went into adding those mono's really makes me wanna use them. I'm also nervous that the lights lack the intensity needed without them, the cobs are only running at 36w each.
The plastic pots are from the small tent, I was gonna just run in fabrics this time, but one of your earlier comments inspired me to just re- use these as no till. I did have to dig out a little more of the old soil than I'd have liked, but had no choice because of the size of the pots the plants had previously been in prior to transplant. Added some fresh soil and topdressed with some 'meals' and compost before mulching. I've used hay this time as opposed to straw and my room smelt like a freshly cut summer meadow for about a week.
......and onions from seed? Are they rare or heirloom varieties? I've never thought of growing em from seed, 'sets' just seem so much more convenient, maybe I'm just a lazy arse, LMAO
I was a bit annoyed to realize there's a cold draft in the cellar exactly where I want to do my soilifying experiments, but then again, a bit of airflow may be a really good thing? Base temps are at 14-16°C, so what am I worrying, in the old one I only had 8 constant 
I definitely need my seedling space first, as I plan to grow onions from seed next year. So we'll see!
