Any chance you could post the Service Sheet for the FD651 that's on my 1992 Panasonic? That's front deraileur.
Use the FD-M901/M900 one and it's notes. They are the same design mech pretty much.
Actually, I already looked at that one and it does not have the flat tension adjusting screw I mentioned in the other thread.
That is why it is best to have the genuine Shimano Data sheets posted.
Anychance you can post the FD-M651 data sheet?