That stuff you pointed out at rei was the first ridge line I had, I used a prussick knot for adjustability. It'll work but save the money and order some dynaglide. If you aren't too heavy oh can even use them to hang on...been sleeping in mine for over a year now. Works great(180lbs)
As far as overkill, check out this awesome thread...
Oh and welcome to the forums from Guam!