>>2847069
If the friction hitch is of a kevlar material (which it should be) then melting is not an issue.

The primary issue is that you can't control the speed of a friction hitch and you can't move it at all while it's weighted. Basically the hitch is either completely open or completely locked, so your system would really only be useful as a backup while you downclimb.

>>2847114
Sick highline man that's a nice roof. Sounds like you've got a good thing going on.