I've got an Olfa rotary cutter that I love, and just changed my blade, using a Fisker's blade. My cutter will not cut properly now...it shimmies back and forth. I haven't paid attention before if I have always used Olfa blades or not, so I'm wondering about it.
Are Olfa rotary cutters fussy about blades? Do you have to use genuine Olfa blades?