Did you read the OP's post? He's using a Dura-Ace RD, NOT Shimano 2200 RD. The Dura-Ace 6/7/8-spd shifters pull less cable per click than other Shimano 6/7/8-spd shifters.
Originally Posted by cappuccino911
Do you understand the purpose behind Sheldon's alternate cable routing? What the alternate cable-routing does is moves the non Dura-Ace derailleur more than the Dura-Ace 6/7/8spd-shifter allows with the shorter cable-pull. So there are only TWO instances where you can use the alternate cable-routing:
1. Dura-Ace 8-spd shifters + non-Dura-Ace rear-derailleur to shift on 8-spd cluster
2. 9-spd shifter with non-Dura-Ace rear-derailleur to shift on 8-spd cluster
The OP doesn't have any of these two conditions. He's got Dura-Ace 8-spd RD. As it turns out, the shorter cable-pull of 9-spd shifters matches the cable-pull of Dura-Ace 8-spd shifters. So... this 3rd condition will work:
All he needs to do is get a 9-spd brifter and it'll shift his Dura-Ace RD across 8-spd cluster just fine. The 9th-gear position will just be locked out by the inner limit-screw.
3. 9-spd shifter with Dura-Ace rear-derailleur shifts on 8-spd cluster