@swingdude, attached to lower D? I've never tried anything but attaching it to my over-shoulder tender for my device (HH2/RR). I gotta try on a lower D - it would prevent my shoulder tender from having to pull the device up the rope
plus pull against the bungee.
However, do you ever find that having the bungee attached to the lower D makes the knee ascender hang up on your leg at all, preventing it from smoothly riding up the rope? Or do you have a slight bend in your body as well so that the climb line isn't laying directly alongside your leg?