Watson, if you have mostly 2.5" strips already, you could make something like this. No foundation required. Granted, this one is made from a "real" jelly roll with a limited number of prints. However, you could still design your own, maybe choosing a colorway you like. It would prevent most of the hassle of cutting to various widths . I have it on my design wall now, and really like playing with the layout.
Whatever center strip you use on each block will dominate the pattern when you put it all together. So if you want all white diamonds, use all white centers. If you'd rather mix up the colors but still have diamonds visually "guiding"the overall design, make sure you choose 4 prints of a certain color for the centers (in this pattern).
https://www.bing.com/videos/search?q...57CF&FORM=VIRE