The biggest problem with Coticules are that each one brings it's own puzzle for you to figure out. I've got mine dialed in (hard with no auto slurry) and it took a lot of trial and error and I can consistently get good edges from it.
I spent an afternoon once with a friend going through his 10+ Coticule collection, the conclusion was they were all different and some were way better than others and that maybe the "bad" ones needed a different technique to work well. That can be the fun and frustration with them.
It sounds like you cracked the puzzle in yours and that's not always easy!!