I wish I could ride the crane cable. Wisconsin strictly forbids that. My 90 foot Rhombic poles with screw in steps not as safe as riding the crane but I have to do that!
I have the Optibeam 3 L 75/80 greatly beefed up (see qrz.w0aih) or youtube n9qip for drone video's
I'd like to build one of your 80 M beams - have a lot of alu. tube! Put "your beam" on a Pirod 200 foot tower and see how it would play against the existing beam at 140 feet.