I made this model as a test after switching CAD software. The measurements are made to fit import guitars in my case an Harley Benton SC 450.

The centre hole is 11,7mm to match the strap buttons on my guitar. If you need a particular size, write the size in the comments and i'll try to make time and upload the model with different sizes.

How to install!

1: Remove the strap buttons
2:  Place the printed part first and then the strap second
3:  Screw the buttons back on the guitar.