Hi~ I have currently the following setup:
Campag 9 Speed Record rear mech with short cage (RUNNING 10 SPEED btw)
11-25 Cassette
50/34 chainrings

I believe I have too long of chain wrap for my rear mech (30) and need a medium cage for better shifting and possibly less cross chaining. So, here are my many questions....

1. Generally how much longer of a chain is needed for going from short to medium cages?
2. What parts besides the two halves of the cage do I need for the rear mech? I assume I can go Chorus instead of Record for $$ savings?
3. Is anyone here running this setup, meaning medium cage, 10 speed 11-25 50/34?

Thank you for your help!

-solarpos