If, 20 years ago, you had said Hi-Tops would become cool, no one, really no one, would have taken you seriously. People would have exchanged glances, shaken their heads and probably called the nut house, nothing more. Two decades later, though, it’s quite a different story, and these rarities have a devoted following all of their own. But while all Type 2s have been caught up in the popularity contest, hardly anyone dares take on the full restoration of one of the tallest Buses of all, because a lot more work and expense lies waiting for the owner, at least compared with a regular Split Screen Bus. More rust, more sheet metal and more paint! Nils Bustorf (yes, that’s his real name) was undeterred by these facts. “I’m a trained…