They soon got to work. They started designing the conduits. With Leonel's help, that was easy. While designing the conduits, they discovered that the nervous system was a better base than the blood circulatory system for the Soul and Mana Conduits.
While doing that, the boys also practised fusing their affinities via Divine Synthesis. At first, it was very difficult for them to create a stable fusion. Although the skill helped them, the result was too volatile for their needs. They continued practising, trying out different ratios of affinities to create something stable.
Finally, they succeeded. Next, they had to memorise the conduits. That took some time because they not only needed to remember the pathways but also their circumference and the thickness of the walls of the conduits. It was easier for Zeke due to his memories but Cass had a hard time.