Reddit mentions of QualGear PRB-717-Blk Universal Ceiling Mount Projector Accessory,Black Mount

Yeah, I usually put way too much thought towards little things when I spend a lot of money and I don't want to screw it up... But I really appreciate your detailed insight.

One quick follow up question: Could you give me an example of a spider style mount you're refering too so I could give it a look myself?

EDIT: Quick Amazon-ing, this one appears to have the ability to shift 1" which would cover the small lens-to-mount center differential. https://www.amazon.com/dp/B00CPHRYYQ/ref=dp_cerb_3

Thanks again!

I'd for sure get a lower gain screen. ProjectorCentral says you'd get a max 46fL even with a 0.8 gain gray screen (16fL-20fL is recommended for an almost pitch black room, 46fL is good for a decently lit room).

What about a 2.39:1 screen? If you mostly watch movies this is beneficial. It would make 16x9 smaller though. If you did a 130" 2.39:1 screen, that would put 16x9 at an equivalent 102"; whereas a 110" 16x9 screen would make letterboxed movies like a 104" 2.39:1 screen in terms of height.

ALR screens are best for this as they don't scatter light as much (and can be viewed with lights/windows open when you don't want it fully dark), but a gray screen would be fine too.

I'd do a DIY screen.

Carl's Place has an ALR screen, and they can do custom sizes, but I don't know if they charge extra for that.

For a 130" 2.39:1 image (50.125" x 119.75"), you'd still want a border, and they sell contrast boosting border tape, if going 2 inches all around, that would increase the needed screen size to 54.125" x 123.75", you can message them and see how much the material stretches, but maybe a 60" by 130" size is good to wrap around.

Instead of building a frame, an alternative is to simply wrap around a single piece of wood board, like this guy. As you can see, it's not that difficult, you just need more anchors to support it (and don't use a staple gun on the back of screen if the staples are deeper than the board, the linked owner used carpet tape). You can build a screen though, there are many videos online, a user just posted here, and followed thos video guide.

So, not sure on the custom screen size, but they sell 81x144 for $365. If just wanting a gray screen, it would be cheaper, you just would have to keep the room decently dark, but when dark and playing 16x9, the pillar boxing would be more noticeable as there is less scatter control.

Going by the manual, if doing a 130" 2.39:1 (50.125" x 119.75"), the projector mounted on the ceiling (upside down) would naturally have the top of the image be ~31" below the lens (and can be brought up or down almost 100x the image height, so thats not an issue). so you can use really any mount, this one for <$25 would work (black or white; 6" profile from ceiling).

The projector has lens memory, so you use that to switch when using 16x9 or 2.39:1 sources.