The best thing about Zack's ability was that he didn't need to know how to build the things he wanted to build. Which was a good thing. He didn't really want to spend time researching how to make a gun or a bullet. He was going to build a smart bullet. He had heard about them from one of his machines. He figured something that could be programmed was the best way to go. It would give him more control. He would be able to make sure that no innocent was hurt by his weapon. 

The building was easy. But gathering the supplies he needed was alittle harder. His ability gave him the knowledge he needed. But he still had to get the supplies he needed to build both the gun and the bullet. Which wasn't that easy. Many of them were not things he could buy in the store. He didn't like having to break the law to get what he needed but for a few of the parts he might have to in order to get the stuff he needed.