I think this is a factor. I’ve only tried 2TC from my rch. The position of the belay loop seemed to pose an insurmountable obstacle to me. I was never able to sit fully and couldn’t seem able to advance my tether. Even with the thigh loop I just felt like I was unstable and falling.Out of curiosity, what saddle do you have? I have an Aero Merlin which allow a more complete "sit" as opposed to other saddles that are more "butt slings". I'm almost wondering if the type of saddle makes a difference.