I cut some No-Rez yesterday with a razor blade. I cut the rubber side with Utility Knife (with the triangular blade) and then use box cutter (with the longer blade the snap of blades) to go through the foam. Unfortunately the box cutter did well in the first few cuts, but I couldnt get a clean cut at the end because the foam just its not firm enough. I can see a band saw or table saw doing better. I haven't cut the angles on the No rez for the top piece that fits in the open baffle space for the tweeter as I want a smooth cut on that one since its visible. I might have to pull out the bandsaw and give it try; but I have a feeling that I had to cut the No rez with the angle

not post since there'll be even less material holding it back. I woudn't let any get scared from using No-Rez, its not that bad to cut with a blade. I'm glad to see that not all cuts are smooth like mine
When are "pre-cut" No-Rez coming to market?

The NX studio flat pack was a breeze to put together; I spend 3x the time cutting the no-rez then gluing the box

haha. It's all in the fun.