So I replaced the rear derailluer on my cross check with a used 10 speed Campagnolo Record short cage I bought at veloswap.
Shimano 9 speed bar end shifter
Campy Record 10 speed Rear Deraileur short cage
Shimano 9 speed Cassette 12-27
The Stock Shimano bar end shifter is still there and so is the stock 9 speed shimano cassette.
I can get it to shift fine in all gears except 3 from the lowest and 3 from the highest. It half shifts and clunks and pops under load.
I am trying to race this setup so it makes the poor shifting even worse. I still have the stock tiagra long cage rear i could put back on but I like the campy better.
Is there a way to make this work? Does the Jtek pulley fix this situation.