Just now reading this, again, as I had missed several posts, and I was thinking as I read, "Boy I must be one smart cookie"!
However, as I kept reading, I can easily see that I am NOT the
only smart Cookie!
That "Fender Washer" became my favorite years ago, simply because it works. And, it works without "bugering-up" the screw head....it doesn't make a single mark, unlike some regular Modified "screw-drivers" are known to do.

Yes Sir, Fyrstk, you nailed it bud!
Russ...