I use the Silverbase Expert which is more or less a more powerful Silverbase that can rotate the heavy JOBO Expert drums at room temperature, plus you can pour the liquids via a funnel into the rotating drum. For removal, however, you have to separate the drum from the motor and manually discharge the liquids since there is no lifting device. Rotation development requires less amounts of chemicals due to the specific inner of the Expert drums, e.g. 300ml for 6 4x5 sheets, and 1000ml for 5 8x10 sheets, respectively. 4x5 and 8x10 film loading is like dropping bullets into a revolver, the open drum having 5 to 6 tubular openings to receive the film sheets. Processing is as easy as film loading. Expensive, but very convenient, and results are constant due to the fixed filling and rotation schemes. Recommended.