All,
Thanks for the replies. Obviously the trick is to make the transition as smooth as possible. I'll experiment a little. I got the code 70 free from a friend, along with some code 55 (way too small to use with most wheel flanges). It seems you don't see much code 55 or 70 anymore. Finding this forum has been a big help to me. Thanks again.
JimmyG
Musician, Composer, Teacher, Soldier