Corner guide / protection for DIY slackline rack

For our daughter, my wife built a wooden slackline frame based on pictures from the internet. To guide the slackline better around the edges and create a slightly larger bending radius, I designed these edge protectors. 

They fit directly onto slacklines with a width of up to 52 mm. The design width in the rack is 69 mm, and the contact surface is 20 mm. However, these parameters can easily be adjusted in the FreeCAD model if needed.

I created two designs: one completely without spokes, allowing the infill density and pattern to be customized, and another with 'spokes' to provide a targeted load distribution. The spokes are thick enough that, when printed a 0.4 mm nozzle, they are printed solid if the slicer is set to 4 perimeters.

For my print using the spoke version, which is also shown in the pictures, I used a 0.4 mm nozzle, 0.25 mm layer height, 15% infill, and only 2 perimeters (Printer: PRUSA  Core ONE, STRUCTURAL Profile). The material was PETG. In my case, the printed parts were stable enough for the application. However, if needed, the part can be printed even more robustly using the configuration described above.

Have fun!