Thanks for all responses! I kind of figured it was just for more flexibility. (Or if you buy a pre-made whoopie - then I totally understand.)
Seems as though if the trees are too close, I could still tie the marlin spike using a stick, and slip the end of the whoopie over that. My suspension will still be one continuous piece with nothing to tie (or lose) for the majority of the hangs. So far my son hasn't had any issue with tree spacing and that issue is waaaaay easier to deal with than always having to look for flat, dry ground .
The biner idea is a good one for the marlin spike, but I'm trying to take weight out. In fact, I just replaced the biners on the tree huggers with Dutch Clips - man those things are sweet!
As far as the abrasion problem goes, I hadn't considered that piece. I wonder if I could find some sleeve to install into the adjustable end of the whoopie. I'lll have to work on that. One of those cable turn insert things would be perfect if it wouldn't fall out and could slide on the whoopie. There has to be some light weight solution here...
And with that post, I totally have access to the PIF section!
also, to simplify:
most people wrap the hugger around the tree and back thru the looped end, whereas youre using the clips and letting the loop dangle. so the MSH and Toggle act as the loop
Give a man fire and he's warm for the night.
Set a man on fire and he's warm for the rest of his life. Dante
anyone ever just made a larks head with the tree hugger around the adjustable loop in a whoopie sling? no 'biners or toggles or what have you?
I love the unimproved works of God. - Horace Kephart