Learning F360 and made this stem mount for my garmin GPS. It's shown with a garmin insert, but if you search for “garmin k-edge” you can find a printable one. The screws just self tap into the mount, although you could use longer ones with nuts on the back. Always use the lanyard on your gps to connect it to bike in case of crash and/or mount breakage!

3 perimeters, 0.15mm layer height, PETG, 25% infill.