Doing my first slot ported box.
I understand doing the 45 on the outside wall of the port in the corner of the box, but do I have to do anything to the inside wall? I am NOT going to do any kerf style cuts to round it out, so should I just leave that as the sharp L and then the outside wall has the 45?
Or do I need to have it with both sides at the 45?
Now here is something that screws with me. How do I account for the corner?
Does this equal 20"?
Or does this and somehow the corner measures differently?
And as far as the face of the box, do I bust out the router to round over the port or does it not really matter?
90% of the boxes I see no one rounds over the outside of the slot port so I am just wondering if it is even necessary.