I would never make a drawer that wide with a 3/16" front panel, let alone one that is 40" wide. I made a lateral file with two drawers that were 36 ...
Our situation was that the hot water heater was on one side of our house and our master bath was on the other side of the house. Took forever to get...
So far I have given away 11 saws to seven different people. These are totally free, and that includes shipping. Why don't I at least charge shipping?...
If you're eventually going to cover it with drywall or T&G, I wouldn't go to the trouble of adding any additional layers of scrim paper or anything....
If it's not dried, stack and sticker where there is good prevailing air movement with just a cover on top so that precipitation doesn't stand on top...
"Technically" the faced fiberglass needs to be covered due to fire risk, so I'm glad you intend to do that with the 'rock or T&G. You might consider...