This is my current version of the Rockshox Zeb bolt on front mudguard/fender.

Fits 27.5" tires, not sure yet about 29". If you print it for a 29er and there is clearence issues please let me know so I can adjust the model!

Mounts using 3x M3x16mm bolts
 

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PRINT INSTRUCTIONS:

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     Rotate the model in the slicer such that the flat face with the holes for the M3 bolts is facing the build plate.

     Support structure is needed to support the stanchion mud blockers.

     Layer Height of 0.12 on a 0.4mm nozzle will leave the surface clean, but can be increased for relatively small decrease in visual quality.

     Z seam alignment should be modified to RANDOM or to a user specified region to ensure the seam is not visible on the top of the mud guard.

      Enabling Slicing Tolerances in Cura Slicer BETA and setting it to “Exclusive” will help with setting the clearance of the bolts.

Printed so far in:

     - PLA+ at 20% infill and 0.12 layer height.

     - PLA at 20% infill and 0.28 layer height.