Perhaps the northern palms are easier to footlock!
It seems to me, even if ya get a line in the head that is strong, and doesn't cut into the head, the line can only hang against the tree, which might make ffotlocking a real pain i think........
Try using the line that extends the ladder, or tie one on the top rung, to wrap snuggly 2x around palm and have person steadying ladder hold it. The steeper the slant of ladder, the less weight on palm and flex in ladder. also the sooner you can get lanyard around. i like a round turn for anchoring to deadman lanyard.
Humble beginnings: The ol'__________ ,________ guy that i first did tree werk with stopped by the other day.
i said "Chris, Dean doesn't beleive that you are stupid enough to tie 2 extension ladders together (end to end now) and climb up on them"
He said "Hell i done it with 3 when i need the money!"
No lifeline, belt, chain brakes, eye protection etc. of course.....