One thing I forgot to mention is that the precut card, is infact not card at all, they are made out of either MDF or chipboard and extremely tough. It may well be that even a Big Bite may well struggle.
Lorraine, as a the crop-a-dile makes short work of stampbord I doubt it's going to struggle with MDF. If you doubt me, next time Glenda is on with the stampbord sensations show on Create and Craft just watch her use her CAD on some stampbord - it goes thru like a hot knife thru butter ;)