Mm I don't think so, the stingray is so hard, a rotary cutter wouldn't work. But thanks for the tip!!
I have experimented with a paper guillotine (which works relatively ok) but again, it's not ideal...
Btw I haven't had a chance to ring the States yet (I'm really busy at work at the moment and with the huge time difference...) But I will keep you posted when I've rung them :-)