OK, I have to admit I have done that, but I only put 2 blades in, not 5. I cut several pieces of fabric and wondered why they were so ragged on the edges, but I didn't really stop and think about it. When I did, I disassembled the cutter to see if I had done something wrong and the problem was obvious. Lesson learned - I don't think I'll do that again.
Darren