And my homemade Single looks really, really, really good.....I'm totally confused.

Bei, any chance you can use the Koolance blanks for a small batch? Tape 'em down to some scrap for the waterjet or something....not sure how'd you align the cutting jet though, hmmm. At this point the only thing consistent is that Koolance-sourced plates are performing well and the others aren't. Maybe I should smooth/bevel the edges of the non-Koolance.