This is the ellipse baseplate remixed with recesses for flush M3 bolt attachments to the body of the phone holder. I used 3 perimeters and 15% infill for this model.
The author remixed this model.
This is a remixed ellipse baseplate from MyTechFun's Phone holder. I added recesses to the baseplate so that the M3 bolts sit flush with the bottom surface and I used nylock nuts to keep the bolts in place.