Originally Posted by
igknighted
Don't use cable tension to align the derailleur on the cogs... that's what the limit screws are for. I had to adjust mine quite a bit on my rival setup, and it shifts perfectly. A little clunkier than Shimano, but I like feeling the shift.
Limit screws are for aligning the cage to the smallest and the largest cog. Tension makes it so you can reach largest cog in the first place. If you can't reach the largest cog then there's no point in the Low limit screw.
At least that's the way it is on Campy and Shimano. Is Sram different?