golfman, Sheila above has steered you right. The clear packing tape on top of the pattern will defiantly help with burning, but apply to the bottom too! I go ahead and apply a blank sheet of paper on the bottom, then the tape. The paper will allow you to remove the tape easier with a little heat from a heat gun or hair blower, or sprayed with mineral spirits.
I also agree with Sheila on using the smallest blade that will do the job. I have never used the Olsen Mach blades, but I do use Olsen skip tooth blades. I would us a #2 or a #5. I also use Flying Dutchman Ultra Reverse blades. For these, I would use a #1, 3 or #5 depending on complexity of the pattern. Good luck!