I was wondering if anyone has tried threading 1/8" AmSteel through 7/64" AmSteel for the UCR. My thought is the thicker bury line will provide more girth for the outside line to constrict down on, and provide a more secure grab. Just a thought! I just ordered some AmSteel (only 7/64") and was planning on making my own Whoopie Slings and/or UCR's, but the potential for slippage in the UCR is a bit of a turnoff. Hopefully this would fix that issue!