The Shapeways nylon is pretty strong but the bumper mounts might benefit from some "beefing up"
I have a feeling that in an impact that the set screw holding the bumpers in place are wanging (technical term) that set screw area as they're being pushed back. Having a bit more material around the post mount and set screw might help.
I have a feeling that in an impact that the set screw holding the bumpers in place are wanging (technical term) that set screw area as they're being pushed back. Having a bit more material around the post mount and set screw might help.