I used the Willian Joseph creel for about 1 season on the flats. I didn't find the single shoulder issue to be a problem at all but I didn't like having the small chest pack. I found it got in the way when fighting a fish. This was especially apparent when putting side pressure on the fish and reaching across my chest. If you don't mind chest packs you probably will like the creel. I still have one I don't use so if you are interested let me know. If you give me measurements of the box you are trying to fit I could also check that out.