Model was made to look similar to the tubular White Knuckle Offroad sliders for the JLUR. It has completely flat bottom so you can slide over obstacles that you would otherwise high-center on. It also offers adjustability in terms of offset from the body and that offset can be slightly different between front and the rear of the slider!
I've ran a set of this sliders made out of PLA-CF for ~15 hours of wheeling time & counting and they held up really good. Strength profile advised. Thinner layers are better if you want to get nice curvature of those tubes and standard supports are highly recommended.