Holy Crap! It works great! Scraped off the resistor for cam 16 (and accidentally cam 15) and can split off those channels perfectly now (no darkness)!
Looped one cam to inputs 14 and 15 (15 minus the 75 ohm resistor) picture is perfect.
Looped same cam to inputs 13 and 14 (both with 75 ohm resistors - normal) image gets really dark.
Only problem is, you now need to use an external T with a 75 ohm terminator if you ever want to use that channel normally again (i.e. not split)
Going to make a youtube video on how it works with results over the weekend.
I love being able to make these cards do whatever the heck we want them to.
Note: I am sure this voids the hell out of the warranty
