"Jim is a visionary," Willson says, "but I don't have any emotional attachment to his plans." The clear implication is that Sears might have blocked any changes to his original design, even if they were shown to improve the growing process. (Indeed, although Sears plans to maintain a working relationship with Solix, he is in the process of forming a separate company to pursue his original, unadulterated dream.) Later this year, Solix will test a new prototype design that will not include rollers-which pose the risk of wearing out the plastic bags-to agitate the algae; instead, bubbles percolating through the green slurry will ensure that the mixture is sufficiently stirred. Additionally, new multitiered, triangle-shaped compartments inside the bags will reflect the sun's rays, illuminate the algae from multiple directions, and, ideally, bump up fuel yields.