Campy Upper Spring

[dabelknap571]

sorry if this is a repeat.... Looking for help replacing the upper pivot spring on a Chorus 11 Speed rear derailleur(non c-clip type). I'm fighting some chain slap and have gone through all the chain length setups and have everything shifting wonderfully, but with the roads in upstate NY I hear it all too often. I did increase the tension slightly by inserting a small shim between the upper stop and the hanger which did improve the situation and proved (in my logic...) that the spring is the culprit. Thanks!