I made the 4-patch first, and had leftover strips and presewn combinations as well as some extra completed 4-patches I didn't use. Plus all the yardage was still out and a huge pile...
So first I cut down the presewn sets and made enough of the four-patches to checkerboard around the outside -- that was how I determined the final size.
Then I used the remaining strips I had already cut, plus cut more strips the same size to make the "jellyroll" part.
The 4-patches weren't hard to use at all, it was the black/white thing that made a simple thing more difficult. With multiple colors you really wouldn't care what you ended with.