DHFiend: Cool YouTube vid, and equally cool trap-lines!!! I've looked around online for any info I could find on those Nacra "Race Adjusters" you mentioned but couldn't find anything. Do you have a URL that you could post here?
Did you have to shorten your trap wires to make that set-up work? It's difficult to tell from the video, but it looks like the trap-wires on your rig may be a little shorter than what comes OEM from Hobie...
The rings and inline sheaves are the two key pieces of the adjustable trapeze system which is a part of the NACRA F18 "Race Package". Call Ron Lane at Fastlane sailing at 619-222-0788. #9136 is the part number of the whole adjustable trapeze system.
As typical with NACRA you will find nothing useful online about the parts and be prepared to wait.
With regard to the wire length - that is the "secret sauce". We have shortened ours to fit us exactly for the range of motion we wanted to use to get in and out of the boat smoothly. How much you shorten will be up to your height and style of sailing....