Another point,don't know if you have ever noticed this".... The Rpra inside diameter of ring gets smaller,compared to what they were,a few years ago i have had to CUT rings off some stock Pvdmrs,along with 1/2 Soontjen cocks. Not with NWHU rings tho,so I've been told,plenty of room for leg growth! My mates have using their rings for years,so there you go Me I'm joining this week! Atb