This was originally designed based on the file from https://www.thingiverse.com/thing:5257073 but I quickly discovered that the geometry of the two studfinders were actually pretty different. I rebuilt it from the ground up using the same basic shape, but using a different mechanism to hold it. With this design, the studfinder snaps in from the side instead of sliding in from the top. This makes it easier to remove it from the high spot I intend to store it at on my pegboard.
This worked well in PLA using a 0.2mm layer height. Orient it vertically with the pegs on the bottom (should be correct in the .stl). I did need to use supports for the pegs and the peak of the curve.
The author remixed this model.