Is it legal to drive a gator on the road? It has no signals, no studded tires but does have light on the hood front and back.
You can open a bedroom or bathroom door. But not a front door or deadbolt. Just slide it past the latch and wiggle it towards you. I do it all the time when my kids lock the bathroom and close it when they walk out.
I thought the sought after temp was 6500K. A lot of that color temp is going to come from your projector and can normally be adjusted. The screen can change it, but again you can compensate from within the projector. By low gain do you mean 1 or less than 1 (non reflective). Something like Stuart Filmscreens SnoMatte 100 would be suitable. Drapers M1300 or Matt White screens are good also. Da-Lite's Matte White or Da-Mat would be OK too. Other materials you might want to consider would be Wilson Art designer White laminate or paint.