Just to add my two cents. There are four kinds of 120 Hewes reels that can be used in a Jobo. Standard Hewes SS reels 120 or 220 can be used with a special SS square rod core in a Jobo 1500 series drum - these reels have a much smaller core and are not specifically designed for a Jobo although they will work. These standard reels are 40% cheaper - although I don't know what the SS rod core costs. Then there are two 120 Hewes reels designed specifically for the Jobo - they have a much bigger 1 inch core for the plastic core that is used on Jobo plastic reels. There is a version for use in the 1500 series drum and another for the 2500 series.
Since there are no 220 films anymore in B&W (and I'm assuming that none of us are doing C41 where there is still some 220) then I would for simplicity sake and easy of use load one 120 film on one reel for the 1500 drums - and get as many reels as film you plan to develop in whichever 1500 series you want to use. I don't think it wise to try and load two 120 films on these smaller reels - in fact I don't think it can be done with the Jobo specific reels. These Jobo specific Hewes reels for the 1500 drums run around $50 each.
I guess if you only have a 2500 drum then it could make sense to get the larger Hewes reels made specifically for it - but they cost $100 each and are more difficult to load being bigger and use more developer. In my option, you are still better off buying a 1500 drum second hand and getting either the standard 120 Hewes reels with the SS core or the special 120 Hewes reels for Jobo 1500 drums for the plastic core.
All these reels can be found here: http://www.freestylephoto.biz/search?q=hewes
FYI: My observations are based on experience as I have used the standard 120 reel with SS core in a 1500 drum, the Jobo specific 120 reel with plastic core in 1500 drum and the Jobo specific 120 reel with plastic core for the 2500 drum. Right now I have standardized on four Jobo specific Hewes reels on a 1500 series drum (with extension) and I do my 4x5 in an 3010 Expert Drum. The one other concern I might have if you have an older Jobo processor with a weak motor is the extra weight of the SS core if you use the standard Hewes reels - it could put a strain on your processor.
Last edited by angusparkengusparker; 06-21-2013 at 04:12 AM. Click to view previous post history.