Nice job. That's how I started out...with an old Cannondale. You can learn a lot from those bikes and they pay back every minute of attention with increased performance and durability.

If you are looking to upgrade, consider better brakes and levers. Those old Diacompe side pulls are weak compared to more modern stuff.

Tektro 530's and R200L levers make a nice combo that is very strong yet progressive.