I think this might be it!

I think the spotted grid will accent pattern. Plan is to alternate tabby shots in 16/2 cotton so the "squares" will be a little taller than shown, use 8/2 cotton for the orange and red, and Susie's homespun 2 ply wool for the cream. I'll try about 24 epi so this sample will be just over 4 inches wide. I'll probably mirror the warp colours for a few repeats to get a width in the reed of  about 16 inches or so plus selvedges.