End grain Mitre lock joints

You might also want to check out some tiny setup gadgets by infinity tools, just for miter lock joints. See pix. You mark the centerline of the material, line it up with the mark on the magnetic jig, and it cuts an accurate lock joint. Comes in two sizes to match bit for different thicknesses. Very helpful.


You might want one of these center finder/marking devices. This is from Rockler.