A local guy has a 77 CJ7, 304, T150, D20, and he has Warn Lock O Matic hubs. Basically if they are left in "Free" they work like automatic hubs, but if you put them in "Lock" they stay locked (supposedly for use in 4low and heavy pulling. Anybody know anything about these? Weaknesses, when they were available, etc..... They are nice but there has to be a reason I haven't seen many of them. Thanks