Quote Originally Posted by ic-racer View Post
A while back I set up a friend with 2500 tanks and 4x5 with the intent on hand processing. We used HC110, and the extra volume of the tank was no issue because we used it one-shot and just diluted it more, but used the same amount of HC110 concentrate that we would have used in a smaller tank.

I'm not following you on the 'black plastic end cap.' Obviously without the light trap and center column the film will be spoiled when you take the rubber lid off to change the chemicals.
I imagine he is talking about the side clips (no idea what they are really called) for the 2509n reels. I imagine they are not needed for inversion processing. But I did use them the few times I used the Jobo tank for inversion of 4x5 film. Seemed to work fine, but uses a lot of developer.