Ive heard, havnt gotten to try it it- its loaded with tri-x as we speak. For some reason I thought it would be more complicated, I found some old post that said lift up two bits of the leatherette to find some screws, and to remove the top before you can adjust it. Dont know how accurate that is, although the screws were under the leatherette where the person stated.
Either way, I guess it might not be possible until I finish this roll.
--my hardware's always changing, yet, never my photographs.