Originally Posted by Renaissance.Man

Oh.. now I am following your logic trail. This notion is based on the assumption that since there is a 957, then the part numbers should begin with 957, instead of 955. However, I am afraid that naming conventions a lot times do not make sense. I think it goes without saying, that I spend a lot time doing research on my 957 in PET for new projects and NONE of the part numbers I order from my dealer ever begins with 957 - they always begin with 955.