Thanks, all interesting and useful contributions. I've spent more than a day on the infernalweb searching for mills but was unaware of the Cereal Killer & JSP until now, at the moment I'm leaning towards the adjustable JSP. As a former Tin Knocker, fabbing a larger hopper should be gravy. Any of the JSP owners opt for the gear drive or hardened rollers? I'm hoping this is the last mill I have to buy, and am an admitted tool junkie, so spending extra for truly useful stuff isn't a problem.
I went with both the gear drive and hardened rollers on my adjustable maltmill because I'm a sucker for the upsell. I have no idea if they were worth it or not, but I'm over a decade in with countless bags of grain and I still consider my JSP mill as my best homebrew investment to date. I will say that my gear drive was on backorder when I first got my mill and I had a couple of experiences where only the driven roller spun, but that was probably operator error. In any case, I was glad when the gears arrived because I never had to think about that situation again.