Yet another seemingly simple shape is impossibly difficult to cut. What I need is a box where all 4 corners are mitered, so you don't see any end grain. I also want it to taper big to small, (pyramid), and to be flat on the bottom. (truncated)
So, it's pretty east to cut the first 45, with a taper. But to get the mirror on the other side, and get it accurate, so the corners look good, I don't know. I've already discarded making the tapered pyramid shape as a pattern, and using a 45 degree router bit to get the bevel. The bits and equipment aren't big enough to do the thickness I want.