Cool David,
I will post some pictures tomorrow on my newest method for proceeding with these. Hard to describe in words, pictures seem to do better. I don’t/haven’t used anything but the laser to place margins. You need to use differing power, distance from target, water, and air to acheive the maximum result. Here is one I did just the other day, from the occlusal. #30.

If you angle the tip just right, you don’t get ANY collateral damage to adjacent tooth structure, and I have a picture in the others I will soon post to show this.

Great job, they can be ugly, but it really doesn’t matter does it? You crowning it anyway! I have many thoughts on that subject we can share at a later time.

Mark