So, some progress with the plasticard. The new blade still wouldn't cut through the .38mm / 15 thou material but at least it cuts the .25mm / 10 thou card without crumpling it. Of course for every step forwards there are two steps back - even with the sheet taped to the mat, the fact that I have to run it through the Portrait twice means that a lot of the horizontal cuts are lifting off the mat and catching, causing all kinds of mayhem. I've salvaged a few pieces from tonight's test but now that I need two pieces so they can be sandwiched together (a single piece of .25mm just isn't thick enough for detailing) I still don't have enough pieces to build anything. Bah.