This is a must-have arm protection for carbon fiber quadcopter frame arms especially when used to race on hard concrete surface. This particular one is for the QuadroHazard Xenomorph 5 UL frame locally made in Canada by my racing buddy. I'll post other arm protectors for other frames I use.
These are designed to be snapped on. No need for mounting screw or zip-tie. The top-ledge and the materal around the screw holes will hold it in place.
Depending on which way the arms are mounted, you may need to mirror-flip the STL to print 2 of them, or 4, or none.