This is made for a 1.5" wide strap, I recommend 3 perimeters, and 3 top/bottom layers, dealer's choice for infill, I have a 0.6mm nozzle at a chunky 0.44mm layer height. This is printed in PLA. This clip should snap on to the guitar easily, the mount point on the guitar measures about 8mm in diameter.
This is a second revision where I addressed a break point at the 2nd slot for the strap, FEA analysis shows that the weak point has been greatly reduced, and it hasn't shown signs of breaking yet.
The author marked this model as their own original creation.