Good job Chad!
It looks very similar to the one I built, except I used grey PVC tubing
for the mast since it is outside.
Reception from planes in the air should not be degraded much with the beam, so you should be pleased with the results.
Yes, that RG-6 cable is 75 ohm and a PIA to work with, but it will do the job with a few db loss compared to 50 ohm coax.
They never did cut the tail off my T-shirt when I soloed. However I did get a certificate hand made from my instructor. I guess I was too old to mess with.