Rostock Max Assembly Guide
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15.13 - Next, grab the Carriage U-Joint mounts, six CNC U-Joints, the package of #4 x 3/8" sheet
metal screws and the last three axle rods.
Figure 53 - Carriage U-Joint Mount Parts.
15.14 - You'll want to use the same sanding procedure as on the platform to ensure
that the U-Joints fit well in the mounts. However, you'll want to slide the U-Joint you're working with on
to an axle and use that to ensure proper alignment in the mount.
Figure 54 - Test Fitting the U-Joint
15.15 - You might want to complete step #16 and THEN sand the components - apparently
mounting the parts deforms the plastic a bit and may require further sanding after installation.