masthead.
Do not allow your partner to lower you. Instead, prusik down. When
you are on rope, NEVER cut a rope. People who get tangled tend to want
to cut things and often manage to cut the rope they are on.
My advice for what its worth.

I'll tell a story as a little reminder of when things go
wrong. I was freeing up a stuck bolt at the masthead with a
propane torch. Smelled something funny. Stopped doing what
I was doing. Looked at the rope halyard holding me up -
melted 1/2 way through (3/8" rope). Also melted through the
spare halyard holding as a safety line.

"Lower me extra gently" was the call...

Evan Gatehouse