Well, I think that if we get company people here because they like to discuss ideas in detail, then we're lucky to have them. After all, this is what PL was for, to get some merging between the wasteland and the ivory towers. Trying to divide that by either sending them away by banning them, or by making it intolerable for them to spend time here, is a footshoot no-one here should contemplate doing, other than to explore the idea until they see its magnitude of error.
Moving swiftly on....
I have an idea for the 60° beam path idea that may resolve a few difficulties with it, and look damn cool into the bargain.
Put the X scanner flat on the floor, as close as it can get. Instead of centering the mirror on 45°, rotate it 15° further so it centres at a shallower slope.
Put the Y scanner a mm further away than usual above the X scanner, and rotate it 15° so the scan-centre points 30° downward.
Build the entire case wall of the front of the projector at this same 30° angle.
Direct the RGB beam down 30° with a single mirror onto the X mirror. This will be easy because you only have to tilt it in one axis.
Explore my earlier posts to save me from bloating this one.
What you get is a projector that can pass a 4.5mm beam at 45° scan angle off quarter-inch wide mirrors, if you're lucky and careful enough with mounts and optics, where only 3.5 mm beam width was previously possible at that scan angle with same mirrors.
You also get the following nice advantages:
A cool look to the projector, which will either rear up slightly to point forward, or when oriented level, will point slightly downwards, and when placed resting in storage will have a natural dust-preventing angle to its front window to keep it clean with no additional protection.
The X and Y scanner, both still being horizontal with respect to the base plate, can be cooled easily in a beefy mounting block, so this scheme doesn't just allow 60° beam paths for low-heat scanners, it will now also work for CT6215 and others that need lots of heat conduction.
Because the difference between mounts may be as simple as exactly how far above the X scanner the Y scanner hole is drilled, they could be made optionally for various angles, 90°, 75°, 60°, or even as low as 50° if you want thin beams at even wider scan angles, or fatter beams at narrower angles, in both cases using smaller mirrors than you usually need. Adapting the down-steering of beam into X mirror will be as simple as aligning a dichro, using the same method whatever scanner mount angles you choose.