Original poster here again.

I went to the local masonry store and bought a dry diamond cutting
blade for my 7-1/4 circular saw. As one poster mentioned....it was a
miracle the way this works compared to the fiber cheapies.

This thing was $25 and it is like no big deal to cut with it. Works
like a charm. Wish I had known about these long ago.

As mentioned, it is dusty work, but I live on a large farm. I just
rigged up a 100 foot extension cord, put on a hat, goggles, face mask,
rubber boots and my "work in the slop" work clothes and aimed the dust
out toward the field. I got pretty dusty, but nothing that a chilly
rinse in the barnyard hydrant couldn't cure...brrrrrrrr.

Thanks again for the suggestions.