Oh same.

The front/back slash notation looks supremely confusing. If / and \ are supposed to be "atomic" clockwise and anticlockwise turns (70 degrees or 40 degrees, depending), and if // and \\ are inverses of \ and / respectively, how the heck would // and / differ? You're just arbitrarily deciding that one of them should refer to 180° + an atomic turn. Also, why / for clockwise and \ for anticlockwise?

Just use notation like UF1, UF2, UF3, UF2', UF1' (the "1"s may be omitted) to denote however many atomic turns of that one edge, imo.