I was a dedicated devotee and defender of Yankee tanks. Must be because I was born in the northern US. Anyway, after so many people complaining about the uneven development in sky or other even toned areas, I finally noticed it in my negatives. I don't often include skies in my compositions so it wasn't obvious. Since then I have tried every possible kind of agitation to eliminate or at least reduce the uneven development. Sometimes I would succeed, other times fail. Sometimes I would succeed and then fail on the next attempt using the same strategy. I have decided that for me, the tanks are inconsistent and unreliable, which is unacceptable to me. So I am returning to open tray development. Yes, I have to work in total darkness, but I actually don't mind it as much as I used to, especially since the developer I am now using is pretty fast. And there is something to be said for sitting in absolute darkness and working by the sense of touch for 15 minutes or so.