I wish to thank all the contributers of this post. I don't get to build 904/998/999's very often, and this is very good information from real world school of hard knocks. I had my own 904 5 clutch, roller E/SA debacle back in the late 80's that left a trail of broken parts behind it, and it left a bad taste since then. (I did end up with a shelf of cores and parts though. ) Thanks again.