For the past few years I've been using the Patersen tanks exclusively for 120 and 4x5 either with the taco method or with the mod54. Recently I was given some Nikor tanks and aside from getting used to the loading of the film on the reels, they seem much, much better to me. They don't leak, they are smaller so I can rotate them with one hand and take less chemicals which is always good. I can't think of a downside them them yet. What is everybody using for thanks for their 120 or 35mm, has anyone moved away from Pattersen like me?