Yes, I have a slight worry about axle snapping and wasn't 100% sure about the nuts being interchangeable, both for thread size and length, so decided to switch the whole set. I'd like to be prepared for most things at the side of the trail, as well as just checking tightness of all bits on a regular basis. Strange as it may sound, I've only worn the Nexx XD1 around the house so far, but it seems comfy enough, and very well made. It's a nice snug fit, and I don't plan to wear it until after "Balaclava season". I've also been very impressed with the shark Explore-R, though the shape wasn't quite right for my head.