Nice plants man!!!!! My door has a mylar layer as well but I still worry about light leaks. I placed the velcro on the inside and thats where the mylar layer comes down and gets sealed. Then there's a layer of black plastic and finally a decorative blanket.

If you grew smaller plants how many plants do you think you could get away with? Your space looks to be roughly the same size as mine.

How long in flowering was the last pic taken?

The yellowing looks normal to me and I would wait and see what happens. Have you checked the ph of the soil? You didnt mention.

Kick ass man. Happy HIGHways to ya.

Laterz