My covers are shared just for expert Makers. DONT try to make it with a common nozzle 0.4 desktop machines, you risk to avoid damages or accidents on your bike and for you.
USE a 0.8 NOZZLE and 0.35/0.4 layer high with ABS, or ABS PRO, HIPS or similar, very strong materials. DONT use PLA!!!
Use 2.4 or 3.2 shell thickness (3/4 perimeters on 0.8 nozzle).
With a big nozzle and ABS or professional material, you will be able to mount them and use them safely for a ton of miles. Actually my covers have 2.000 km without problems at all.
PRINT the dx or the sx version and assemble them using stainless steel bolts.
Use the stongest cable ties 5 or 6 mm large you could find.
If you like, you can put a double-side industrial adhesive tape on the back side, to prevent turnings around the leg.
Actually my covers did'nt turn at all, even without the tape.