If you had your climbing line in the other tree, Quercus, you'd have to pass within a foot of primary power lines, phone and tv lines, etc etc. The wires are VERY close to the other leader, which is why I didn't use it for my TIP. I actually had a reason for not doing it.
That, and if I were tied into that leader, but out on the other one, and lost footing or some such, I'd swing back across right into those lines. Probably it'd ruin my day. If you actually look at the pictures, you should be able to see the lines I'm talking about. It didn't seem like a wise choice. Plus, if I was really worried about that limb failing, I'd still have been connected to it. That doesn't really seem to smart. <shrugs> As to how I climbed it, I already posted that. (threw a line over, used a running bowline, and ascended straight up using a Petzl minitraxion and tibloc) I ratchet strapped it both for security and fall protection.
Racks though, ohhhhh yeah. I'm glad you understand how awesome they are
I love that thing, ever since I got it it's just been sooooo usefull. I like that you can use more or less bars depending on the weight of your rigged piece, which affords you control dialed in just how you want it.