I use mine for sheet film if using Caffenol Semi-Stand. I use 400ml chemicals and rock the tray gently to act as a slosher tray. I do not use the base, I stand the Orbital in a 10x12 developing tray with a water bath and this is sat on an electric dishwarmer, this prevents the chemicals cooling down during the 70 minute processing time. I also do a 4 minute pre-soak. I have never had a bad negative using this technique, although lately I have been using a 3006 Expert Drum in Pyrocat HD as it processes 6 sheets of 5x7 rather than the 2 sheets in the Orbital.