I've given up on the prussic's. I have 2 plastic toggles. I just keep the CRL loose until I get the toggles where I want them. I tighten the ridgeline using a dutch fly on one end. Then I have a length of zing it on each tarp loop and I wrap it around the toggle. It snaps in and locks the toggle from slipping and locks the tarp line from loosening.

Tree---Dutch hook-----toggle-----tarp area------toggle--Tree---dutch fly.