The comments about how the manufacturing of blades causes drift with fences is valid with conventional blades but the use of spiral blades causes equal drift in all directions which means no drift at all. The added advantage is that spiral blades are non directional so I have been able to cut straight lines over a metre long by moving the wood to the side rather than away from me. I have a Hegner Multicut 1 and improvised a fence with a straight piece of wood and 2 clamps. The only negative is that spiral blades cut a wider kerf.