Joshua,
First and foremost, much support for going spikeless. Its easy to see the ugly spike marks on the trunk of the palm. Much support for the enthusiasm and evolution.
This system works for you. You are young, strong, and have low hours on your joints. In reality we only have so many "miles" on our joints. I'm going to suggest that you use these "miles" more efficiently.
Some critique for further evolution.
Looks like you have a floating anchor point. I'd install a pulley in place of the screw links to slightly tweak your original system for greater easy. Way too much unnecessary friction, IMO.
You are essentially installing a SRT type line with your 7/16" double braid, and having the doubling force effect of the SRT technique.
Footlock and body thrust propulsion wears you out and will wear out your body. As Tom D said, legs for climbing, arms for working. Efficiency.
Why not move to a simpler, faster, easier SRT set-up. Using Tom D's suggested method of SRT anchoring at the base would work easily on a palm, since there are no branches mid-trunk. You can simply shoot a line over and get the end to the ground (tie a knot so you can't lower off the end.)
Add extra length on this end if you might tranfer trees and need some extra length to self-lower out in an emergency.
Pick up your rope bag, and spiral around the trunk of the palm enough times to build enough friction that your working end will not move, then tie-off at the base. Tom D posted a recent SRT anchor tie-off with a friction hitch, so you only need a long enough rope (3 times the highest working height, or tie two ropes together) and you have a ground lowering system.
I've been using an SRT system that has the capacity to emergency self lower on a VT hitch (but its not easy, only for emergencies, and pitch on the rope sorta negates its functionability). One Pantin, one VT, two handled ascenders, the lower one with a 4' sling for a foot loop for my other foot. This is cobbled together with existing gear.
Jerry Berenek put up a rope walker system on YouTube for ideas. I think Treebing has up a rope walker system on YT, as well.
These are more refined. I think that Jerry uses a Pantin on one ankle, and a floating Pantin near his other knee, with a footloop down and bungee up to a chest harness. I think that this system can be implemented with the friction hitch and minder-pulley that you have, purchase 2 foot ascenders and some bungee cord, and a 4' sling/ biner/ pulley.
Tweak the hitch to fit your rope, weight, and rope condition (wet/dry).
Rather that spending the dough on a chestbox roller immediately, I think that you could make a simple chest harness with your lanyard over your shoulder, bandolier style, with a pulley and biner, or just take about a 4' sling, twist it over to form an "X" with two loops to put your arms through, and use a biner or biner/ pulley combo on the front, capturing the two bights in the biner, and your climbline.
As Jesse indicating, RADS can work, too. I used it a lot before, but was not as fast, and more one-sided.
Keep on going with your evolution. Great to see you're stoked on it.
check out canopy chatter, look up Moss's DdRT ascents with a foot ascender, very slick, smooth and quite fast.
