Print upright with supports. ideally with a very thin layer height 0.14 mm or lower but if you don't want to wait, enable variable height in your slicer. the exterior finish won't be as consistent, but it will still be smooth.
The author remixed this model.
Made the grip a little slimmer near the top area so it's easier to reach the shutter button, and countersunk the ¼-20" acre whole so the camera can sit flush on a table.