Just wanted to update on the sliding issue. I got 12mm climbing rope and was able to girth hitch it to the tree and it works like a charm. No sliding at all in the last 2 sits! I also have a rope bridge now on my Sit/Drag instead of webbing and it's so much better too. I am STILL waiting on my Ropeman1 to come in so I am climbing with a prussik on my lineman's belt, which sucks, because as a bigman it is somewhat unnerving to have to use 2 hands to adjust yourself, but it works.
Last questions is I use a actual full harness that came with a tree stand to hook my lineman's belt to and I leave it on while sitting for safety purposes, but have been unsure how to attach my saddle to it, not sure if I need to but want advice if I need to or not. I am careful about safety so I will employ any and all safety measures. Because you know "bumbles bounce" but bigmen go splatttttt!