I know it's not much, but I did find this:
http://www.panzerdiesel.com/data/e/27p5_karo.html?PHPSESSID=c2fcaf106d839ffd95658218ea50cc46
There's a neat diamond patching on the hatch in the rear, and also I've see it on fenders. In fact, the Red 221 (the Early A I just did) had diamond cross hatching on the fenders in the pics I have seen and I carried the detail onto the rear turret hatch. Never seen one w/ a full hull that way though.