Ok, so my Cool Components stuff for venting the PJ box is scheduled for delivery today and so I'm going to start framing the rear soffit/PJ box tonight.
Here's my plan so far... any suggestions would be amazing.
1. Projector will "straddle" the rear 2x6 wall that is shared with the adjacent equipment room.
2. I'm planning on using some 5/8" OSB underneath the projector box framing as a shelf. Then simply applying drywall to the underside of that for the finished look. This is to minimize the height required for the box and providing a shelf that is flush with the 2x6 cutout in the wall. The rear feet of the projector will essentially sit on the wall framing, the front feet on this OSB. Should I be concerned about this from a support perspective?
If you use the liquid nails and put multiple 4" screws in the 2x2s ( I would use 2x4 here) that is attached to the rear wall it should hit the 2x4 under the drywall. I would over kill and do 4 screws on each side. Build the box first than put it up. Use the liquid nails and multiple screws through the 2x2s on the ceiling like you did all other soffits
3. I'd build the projector box first and then use some drywall on the sides before continuing with the rest of the rear soffits. This gives me an easy way to seal (using Silenseal) the projector box.