Marty, if your bellows is in decent supple shape what you do is put the Packard inside the camera right at the inner side of the front standard with first bellows fold sort of holding the Packard in place snugly. Then you have to bet an airway from inside to outside somehow (can be tricky). But once that's accomplished you can buy ALL my old barrel lenses and all you have to do is make up a lens board. Yes, outside shutters work OK too. Glue a 'core' from a 2" wide tape refill when it's empty and then you put some foam to make the lens a tighter fit to the 3" wide X 2" deep core.