I've used the NRS side rail racks on my cataraft for a few years and like them. I have 4 of the 3 footers. I like that I can use as many as I want & need for a particular trip. I like that I can easily remove them or move them around on the frame. I even attached one to the back yoke once to add a little length to the frame. They must be supported across two cross bars to walk on them. Down sides are price & a bit heavy with the Lopros. Lots of cheaper options out there for sure, but these do work great.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb