That's cool but your results would multiply hugely if you put a bunch of ground-mounted radials on that antenna Dave W7UUU
If you want a better endfed take a look here https://www.hyendcompany.nl/ Horizontal or Vertical it does the job. No counterpoise needed and works great.
We've built a number of these antennas at a club build-a-thon, and they do work. I have a heavier duty version I run when portable, and it works pretty well - with no counterpoise. If you are running over 5-10 watts, you'll want the radio way away from the balun and you want to use at least the minimum amount of coax spelled out in the instructions.
