"Hi ThomasLong response, but in summary I share your sentiment ..... lovely lateral thinking but more than likely out of touch with its practicality in real life circumstance.The bench is likely to lose its original function all together as it becomes a 'home' and potentially a rather unsavory place for a member of the public to sit. That is of course unless a cleaning crew comes around to sanitize the benches every 24 hours!People who use these 'sleeping quarters' don't necessarily keep office hours and the bench may well be occupied throughout the day.Another point, for example, during a rainy day fights may also break out between potential users as to who is entitled use the bench shelter .... the person who used it the night before or first come first served.How about build and put one in place and watch accompanied by police and 911 at the ready if it gets ugly . . . Build a managed shelter for 50+ homeless people (bunkbed barracks style) and make a practical difference. end."

"AndyFantastic idea yet it appears that manufacturing costs and time will be initial and potentially ongoing stumbling blocks.I have a couple of thoughts which I hope you find of some value:1. One of the screws key selling points is its flat "presentable" surface. The extreme tolerances that are required to make the screw slot visually disappear are part of the screws cost and manufacturing constraints. Have you ever thought that just having a flat finish is more then enough? Why not make the recess cover of a different material and maybe a different vibrant color? Make its 'disappearing' act merely of becoming flat while its vibrant color shows there is something unusual below.2. By using a different material e.g. plastic, you can 'simply' cast the recessing cover in a mold and (clip it to the spring below ..... excuse my design assumption).3. A further line of thinking . . . . the bit / key to loosen / tighten the screw looks particularly bulky and heavy. Why the fancy bit shape? Why not a standard flat blade (3/4") or standard Robertson (#4) bit? Are they not big enough for the torque you are expecting?Could it be reduced to a bit that slides into the screw slot? 4. You have 3 magnets on your bit plate. Why not magnetize the bit so it holds itself in place in the recessed slot. As it would be a smaller and less powerful magnet, the strength of the spring that controls the recess cover needs to be scaled back.5. Enough of these spurious thoughts . . . . . last one . . . how about calling them"FlatFace screws" ? You could create and interesting logo style with that name as you have 2 Capital Fs . . . . (Google tells me that stand alone, the word 'FlatFace' has been linked to a fingerboard brand (miniature finger skateboarding) . . . . who would have thought!Amen."