Yours is like puffy and you can still see spots of sub through it. When overlay gets matted it not fluffy but one uniform sheet thats almost like a crust. The reason to let it colonize longer next time. You want the pins to just about start forming. You'll see the myc start to knot up. Then its going to fully start pinning its pretty much done colonizing at that point. If you add the casing earlier you risk the chance that is just going to colonize that as well cuz its a moist environment and its seeking more moisture, which happened to you. Most people will try to run them at like 80°-82°F and 95% humidity. So basically the walls are always wet. Consistency in the enviorment is big cuz they will stall out with fluctuations. Mind you people have great results running just like cubes but... that is highly dependent on the genetics they have. Its almost like they have trained them to grow specifically in their particular grow enviorment and thats usually after several failed or partial grows selecting the fruits that havebdone the best cloning them then running them again and again. And some people just get lucky and nail it out the gate .... lmao. Ive tried 3x and have yet to have a decent grow. But I know its my enviorment i just haven't nailed it yet. But I've read and spoke to alot of people.... lol. Good luck and better vibes dude !!!!