Jobo reels are in compatible with paterson tanks.

The minimum chemistry needed for the Jobo 2520 is 270ml for 6 sheets, 640ml for 12 sheets in the 2550.

(all Jobo tank capacities are here: http://jobo-usa.com/images/manuals/t...capacities.pdf).

Developing by hand does not necessarily mean inversion, tanks can be rotated on any flat surface, or in place on the inexpensive Jobo roller base #1509 if one need to or wants to save space.