Garmin Varia Seat Mount

The original design I remixed could be printed in an orientation that provides the strongest layer adhesion on the seat-post and only a small amount of support scarring on the underside of the overhang beneath the mount. However, it required purchasing an insert to install the actual garmin locking interface. So, I completely redrew the model and used the excellent 3d-printing friendly garmin interface model. It is now intended to be printed standing on its end.

I recommend 3-4 perimeters, ensure wall thickness, and 25% hexagonal infill. This provides sufficient strength to make up for the less-than-optimal print orientation. You need to paint on supports in the 3 locations shown in one of the images. Organic tree supports are best.

My first test print was with PETG and the gif with the mount in blue shows its strength. I also printed it in PA6-CF and PET-CF. Both turned out very nice and 0.15 and 0.2mm layers worked equally well for the internal clearances for the interface and lockring. They were quite difficult to purposely break and the nylon was stronger.

The interface spring should be printed with 3-perimeter and 100% infill. You can optionally set a height-range modifier from 2.0-3.4mm to use a 0.1mm layer height. This will make the locking ramp tabs a little bit smoother.

The interface lockring needs to be flipped upside-down relative to the STL's import orientation. Using 4 perimeters for this block ensures it will be solid. You can optionally set a height-range modifier from 0.6 to 1.4mm for a 0.1mm layer height to give the best definition to the outer perimeters.

I recommended to not use a carbon-fiber filament for the lockring and spring.

You will need to remove the seatpost to install this and a M5 20mm (or longer) cap screw and M5 nut is required.