I'm experimenting. I use extremely thin mono, ie, 7x Tippett diameter line on a couple of my XUL setups. It twists very easily and can break. Anything that will reduce the line twist on this line is a plus.
A side note: Those particular spinners were designed by Floyd Pease, a well known smallmouth bass fisherman here in AZ (since passed away). He recommended the 45 degree bend in the wire as well as using a barrel swivel. So I tried it on several of the spinners.