Thanks for the feedback. I’m aware that we weren’t legally bound as we were not in contract…which I’m pretty sure I mentioned in thr original post. What’s upsetting is what seems to be the lack of integrity. One doesn’t have to break the law to be considered in the wrong. And how sad of a world is this where we can’t even hope for someone to do the right thing anymore - only that they remain within the confines of the law.

The miter will swell and shrink through the seasons, and open up a gap, if you do not have pinpoint humidity control inside your house, in all seasons. Mitered edges expose the most cross grain joining of any type of joint, and have the most movement.

If you do this, you need a high skills woodworker or cabinet maker to do something like a dovetailed splined miter joint. This is not going to be any type of money saver. It will cost more than a basic stone.