Success my friends! My 90's Trek 800 has mutated from a 7 speed to a 9 speed

Thanks for hanging in there with a newb till he graduated his first baptism of fire....

Test ride today suggests a small adjustment to the front derailleur and I still don't have the 9th speed in play, but I understand that to be a needed adjustment to the (lower?) bound screw on the rear derailleur....

All in all, it is like having a new bike!