Just be sure to clip your tether into your bridge/lineman’s while it’s around your tree or you could take a ride.
Maybe back the belay loop up with a carabiner and vertical bridge, or a quick RC daisy-chain bridge? Before trying the daisy chain though, check out the safety videos and how to properly load and hitch them.Assuming you are using a RC harness to back up the SitDrag, you could...
Reach hunting height, and attach the tether to your back up on the RCH. Now you can remove the LB and set it as your bridge. Then connect your bridge to the main spot on your tether.
Actually doesn't sound too bad!
I'm using a 22kn sling, actually two of them... I twist one in half and loop it around my arms so there is an X on my back. I can connect that to carabiner as back support if I want to as well.What is your minimum MBS for your "slings", 23 Kn? Think the TETHRD LB is about 6000 lbs.