Simple to use: Circular cutter each equipped with 2 additional replacement blades, rotary cutter adjustable, cutting diameter of approximately 8-32 cm/ 3.1-12.6 inches.

Seems to me the paper on its own doesn’t stay straight. At 1:28 you can see a standing wave accumulating in the paper. This will on the one hand cause non-orthogonal cuts, which could even ...