A few weeks ago, I finished a magazine assignment in that I used mostly A-12 backs but went with my lone A-24 when shooting in heavy snowfall. So I got my film back and it is cutting off 1/3rd of frame #1 consistently and leaving a good bit of wasted film on the end of the roll. I am wondering how I can adjust the back to start in the right spot. I have thought that I could pass the arrow by 1/2 a turn since I rarely use the back, but I might forget so I would rather look at getting it fixed right. Any suggestions besides sending it off to David Odess? P.S. I kind of got tired of not being able to critically frame with my 500 CM's and 180 CF, so I caved and bought a mint 501 CM which will replace one of my 500's, I can't wait to get it next week!