[Closed] Help - SRAM X9 Rear Derailleur Problem

Hey all,

Hoping some STW gurus may help me out with this one.

I caught my chain on a branch during a ride at the weekend, it stopped me dead and bent my rear derailleur hanger. A quick bodge fix on the trail got me home with some awkward shifts.

I got home and straightened the rear hanger - so far so good. However when checking the shifts I noticed my granny ring is now pretty useless as chain slack on all but the biggest cogs is horrendous!

Pic below shows slack on small-small combo:
[img] [/img]

To troubleshoot I checked the following:
1) Check rear derailleur for damage - nothing snapped, bent or out of shape
2) Removed and refitted derailleur - no probs
3) Checked H, L and B-tension adjustments - all good
4) Checked chain wear (I'm grasping at straws now) - fine
5) Checked frame, dropouts and BB for damage - fine

Edit: There is a small screw on the pivot barrel I left untouched. Could this be the one? (might try this one tomorrow)

Other than granny ring slack it's shifting as good as always. In short I'm stumped, anyone have ideas how to fix?