Re: [tr027] 615 ft antenna. 4 guide wires.
I have the exact same tower 40 mins from me, I've been jumping 4 years, and I've never fancied it, i know of 2 ppl that scraped the wires after off headings, 120 degrees of freedom is the minimum i like, 90 degrees just isn't very appealing.
But I've seen video of this tower being done slider-up, and I've done it from that height, just go for a minimum of 3 secs, although I'd personally recommend 3 sec slider down, simply for a better on heading performance.