Zero Clearance insert for DeWalt DWS780 Miter saw.
I suggest using 0.4 nozzle with 0.2 layer height and 80-90% infill (60% should still work, but not tested).
If you have smaller printer like me (X1C), you need to cut the insert in half and add some plug connectors (inlucded in *.3mf file).
After that, only thing you need to do is to cut it while screwed in your miter saw. Don't forget to square your blade before the cut, then USE SAFETY GLASSES and shop Vac.
Enjoy