On most semi-float rears, with ends not compression fit with bearing, these are a breeze to install. Seriously, like a 10m job on each side. The process equates to removing and replacing the spiders. I haven't pulled an axle shaft on the Roxor yet, so I don't know if they just slide out. If they do, it will be super easy. The process is greatly simplified by the diff case not needing to come out. Therefore, a gear lash does not need to be performed.
These work with springs and blocks to keep the axles spinning together.