Yes, the current blindfolds are not the ultimate solution for blindfolded solving.
I have been looking for the welding glasses recently, like you proposed long ago.
I found the (almost) perfect glasses: you cannot see through them; they look professional; you can clean them easily; you cannot place them incorrectly, because they fall into place automatically; they can be bought all around the world. The only problem is: they have small air holes on the side, which still give the opportunity to cheat.
The distributor is looking for a slightly better version.
I like your pictures.
I prefer the first option with the table. But maybe it would be better if someone can construct some kind of box, like they use for Bridge.
Any one else with a proposal?