ere the details of mine:
I don't have a duo r or rx, just plain original duo, but this is plugged to an xrgb 2 plus for the best visuals,
* purchased some time in 2003
* Ebay seller - can't remember
* i have a core grafx, un modded
* This Duo has an RGB modded with a 8 din AV jack (that carries the RGB signal), shame i have used a crap cheapo ps1 cable cos i get wavy noisy lines, tyring to reshield it to improve picture quality, but the results are wicked apart from the wavy lines), blue led as well