Shug - your vid was the first I saw of the weightless wonder, and I have been infatuated since!
I doubt it will save much from the weight of the tarp itself, but it will definitely require less cordage and hassle. Also, I'll be removing the tensioners from my guyline, I think, which should amount to less weight.
I think I will have panel tieouts on one side after all - provided they don't add much to the cost. Initially, I figured it would be unlikely that I would use them, but you're right - tieouts on one side will increase resale likelihood, and if I know I won't need them, I just won't bring line for those tieouts. At least they'll be there if I do ever decide to use them.
Thanks for chimin' in, fellas!