I do not seem to get on well with tray developement so I am looking for some drum-like possibilities. Curretnly I do use Jobo 1521 for my 120 films with good results, so I started to consider the bigger 2521 for 4x5. My developeroch choice is Pyrocat HD and I use inversion agitation. Also - I do not make large production runs - max of 6 sheets at a time is about right.
But before I invest in this direction I would like to ask about your opinions or suggestions.

A few questions:
1) How much chemicals (volume) is needed for inversion agitation with 2521
2) Any caveats about the procedure or the drum itself?
3) Any "better" drums to be considered?

thanks