I do not have experience with the Overdrive or Code Red...
My Severne NCX has also a pulley with 4 rollers and my old extension had only two rollers and a brake (it means one was missing on the extension). I have to say that NCX is not easy to downhaul and there is a lot of force needed to get it rigged properly.
I used to left out the second roller on the pulley...try it, pull it down with a screw drived or with a help of a harness hook and pull hard!!!...I believe you can get it done.
Wish you a good luck.