looking for advice on rounding mitered corners

It just depends on how much of a round over you want. If you want it rounded over the entire edge of the board, I usually use a 3/8 round over bit on 3/4 stock and round it from both sides adjusting it until the round over meets in the middle of the edge of the board. I always test it on a piece of scrap to be sure I have it adjusted correctly. You might even make several passes so it doesnt chip out.

-- Wayne - Plymouth MN

Because of the relative abundance of 3/4” materials and the ease of making a mitered corner, make a mock up of the the corners and test your different bits. It’s the fastest way to get the answer.

-- Thuan

yeah, that’s great advice, I’ll definitely be doing that.