I just setup my simulator in my garage, it's about 10x11x10 with a 10 ft. screen.
About myself for swing speed, size, and such. 6ft. 180lb athletic, 32 yrs old. I can swing my driver up to 123 if I really want to but sit around the 110-115 mark casually.
I have a long throw projector mounted about 9 ft. above the launch monitor (tried with it on and off) Monitor I've tried 6, 7, and 8ft behind my ball.
I have tape lines on the floor to align the monitor straight. I have a level for the monitor for front-back and left-right leveling. My launch monitor i've tried level with the mat, below the mat, above the mat, back tilted forward, no luck.
My 9 iron I typically see a 140 carry, I swing out of my shoes and it goes 133. Normal swing gets me about 110 (swing speed says about 82 mph).
4 iron I normally carry around 200, I can't get it past 130 carry swinging as hard as possible.
I normally carry my driver 250-256 with a 112-115 swing speed (stealth 2), I am barely cracking 210 swinging out of my shoes and swing speed says maybe 110 (should be at least 118-120 with how hard I'm swinging).
There is an outlet and a CAT6 ethernet plug behind the impact screen but nothing else, A/C unit on the outside of the house behind the wall through the screen, drywall, frame, siding, etc.
I have re-calibrated the monitor depending on if I changed my setup, height, level, etc. I've adjusted the elevation, weather, etc. and it ends up making my driver go way long but 4 iron won't move distance at all.
