Skinny 3 begins with a pretty standard folio design that happens to benefit from STM’s use of a really sharp-looking nylon material covering the exterior. Holding the iPad in place is a hard plastic shell on the right hand side; it’s identical to the one used on the also-new Grip, with the tablet simply snapping into place. Once you hear clicks on insertion, the iPad’s quite secure. Compared to the previous version, the edges are much…