Finding it hard to shift to larger cogs on cassette but shifting to smaller ones is fine.
So far Ive checked -
Cable and housings
limit screws properly set
Different derailleur fitted (no improvement)
New cassette fitted (was worn anyway)
New chain fitted (was worn anyway)
Chain length correct
B screw adjustment
Hanger alignment correct
Jockey wheel replaced with correct upper / lower
The only other thing I can think of is my shifter / STI lever is worn, but before I think of replacing it can you offer any other suggestions?