Quote Originally Posted by OzJohn View Post
Unless I'm missing something wouldn't this give you 1.5 times the exposures of 120 not twice the number as with 220?

BTW although it is possible to develop 220 film in Paterson reels they don't appear to have been designed with that in mind. Unless the lead and tail ends are trimmed, it is impossible to fit a 220 film entirely within the spiral groove - there will be a few inches that need to be left curled around the outside of the reel. OzJohn
The System 4 tanks list 220 as one of the sizes compatible with the reels.

And I regularly load two 120 films on a single reel without problems.