I use regular hand-inverted tanks for my 120 and 35mm film and only need the drum to do 4x5 film. I looked into the Jobo system for 4x5 but can't justify the expense and even if I could I wouldn't be able to afford it. Also, I'm planning on using a drum system as my darkroom is light-tight enough for printing (did some fog tests) but not for tray-developing film.