I bought a 1973 Raleigh Competition today. It has a Huret Jubilee rear derailleur mounted on a Huret dropout. The dropout has the stop positioned well forward of a standard dropout. I want to replace the Jubilee with an older Suntour derailleur. How can I create a proper stop on the dropout? I guess I could use an extra-long adjusting screw and bend it slightly to contact the stop, or maybe there is some kind of washer available. How do people deal with this?