I had two of the original Mod54s and have happily just sold them. Convenient as the smaller Paterson tank might be with its smaller bulk and less weighty fluids I find I prefer my Jobo 2509N reels. When I had a Jobo ALL I used to use the Expert drums but I did not particularly like the constant agitation. Almost entirely dedicated now to Diafine, I actually only seek extremely minimal agitation.
"Photography was not a bastard left by science on the doorstep of art, but a legitimate child of the Western pictorial tradition." —Robert Galassi