I haven't used the BZTS tubes, but they look a bit clumsy. The Jobo tanks work great on a Jobo processor, and I hear you can use them on a Uniroller, but you can't use them in a conventional way. For instruction, I would tend to favor conventional tanks. For rolls, the Patterson tanks are excellent. For sheet film, most of the available tanks use a lot of solution, which may be a factor for you. The Combiplan tank (available from Freestyle and possibly others) will handle six sheets and use only a liter, however. The out of production Nikkor sheet film tank also used only a liter of solution. If you go the roller way, the old Unidrum could process four sheets in only 200 ml.