Eparys, thanks!!! Spaced squares worked and was a lot less work than my idea. I tried blocks and tiled squares, but couldn't get them to work quite right. Tiles added a spacer border to make it fit. Blocks I have to fool around with more to figure out what exactly it is doing. Spaced squares worked right away.
I thought I had tried all the options, but I did not realize there were additional options with some of them. Another hurdle behind me!
