Lazy: Harry's $124 120/220 strap hanger modification works very well and may be a bit easier to use than the factory 12/24 switch. I have both versions (on different cameras!) and it's a wash if you keep track where you are on the roll. Either way, you lose one frame between twelves. You can buy lots of film with the money you save going the less expensive route and have your transport tweaked at the same time. Health, Peace Lance Selma, NC 27576 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ In a message dated 6/29/2008 10:18:22 A.M. Eastern Daylight Time, surgeon24hrs@xxxxxxxxxxx writes: I know I am kid of a lazy guy. When I shoot mediaum format, I prefere using 220 films. It is just becase I do not have to change rolls very often, especially when I am using slide films with a lot of bracketings. I take a lot of street photos. It is a little awkward to change rolls on the street frequently. My 2.8F does not take 220 films. I found on Mr. Harry Fleenor's web site that he does 120/220 modification. _www.rolleirepairs.com/220mod.html_ (http://www.rolleirepairs.com/220mod.html) This sounds good for a lazy guy like me. Has anybody had this modification? Any opinions about pros and cons? Thanks, in advance, for help me deciding. **************Gas prices getting you down? Search AOL Autos for fuel-efficient used cars. (http://autos.aol.com/used?ncid=aolaut00050000000007)