When we first saw Gelz a couple of months ago, they were throwaway-class Chinese cases for the iPhone, complete with the sort of first-wave issues we came to expect from such things: mediocre fit, coverage of iPhone’s proximity sensor, and poorly cut top and back holes. They also had an unnecessary hole for the Home button, and a depressed circular area on the back near the Apple logo. (You can see two photos of the original design at the bottom…