A couple things......
The bicep supinator machine is different from what I can tell because it appears there's tension through the supination.
To my knowledge....I don't know of one other out there that does.
But....
The cabling looks to be rigged at 50% or less. I did a basic "once over" but the ratio's looked reduced. Not saying thats good or bad....especially with a small muscle group you want smaller increments in adjustments, but you're claiming it to be higher.
Second.....
All of those freeweight machines aint worth a piss if you don't have enough weight. You built them (for some odd reason) to accept Std 1" dia. plates especially when during that time everything was being built with 2" Intl. Looks like you have a bunch of 50's, but when you're training legs....you got no damn 100's. In another words....aint worth a piss. Unless you got a ton or so 100's with 1" dia laying around...but talk about a needle in a haystack.
When I get time, I'll examine more in detail some of your designs. Some looked 'interesting' but others look dumb as hell. You have some design flaws & some of your 'inventions' look downright unsafe.