OK, I am very intrigued by this issue. I have the basic Olfa cutters. Went back to the Olfa website to review the videos there which I only watched once the first time I changed my blade. Pretty much as I remembered. When the demonstrator shows how to remove the old blade you can see the nut isn't very tight by how easily it starts turning. And when she replaces it she uses the term "finger tight" to describe how to tighten the nut. Hardly a precise term. I haven't ever tightened mine down hard. And I've never had trouble with either loosening or with the blade not turning because I had it too tight. It seems to me the curved cowboy hat shape of the nut would provide the correct amount of "give" as long as you don't over tighten. But I was certainly willing to try something new, so last evening when I had some cutting to do I checked the tightness I already had and backed up the nut by 1/4 turn. I didn't feel a difference with cutting, and didn't notice a wobble. Then I tried an additional 1/4 turn. I did feel a difference. The performance of the cutter wasn't different, but I was cutting shorter pieces, so maybe long cuts would be different. So I am still kind of in the dark about this.

Anyone else make changes in their cutter and find something different? I will do some cutting of longer pieces of fabric this evening and will post again. I'm interested in what others have learned, if anything.