Some time ago my girlfriend got a bike at the LBS, a Brodie Ronin, one of the steel models with disk brakes. She has small hands and doesn't care for brifters, so they set her up with some older Campy shifters/brake levers (integrated, yes, but each lever only does one thing). It's got one of the J-Tek adapters on the rear, a #2 if the single, stamped number is any indication.
She's had endless woes with the rear shifting. Just never feels quite "right" even when tuned up, and seems quickly to go out of tune--obvious to my not-terribly-trained mechanic's senses with ticking and grinding and so on. At one time or another the LBS has seen the problem as the tight leather bar tape (cleaned up some leather dust that did seem to make a difference) or other factors.
I double-checked, and with a 10-speed Campy shifter and 9-speed Shimano rear der., as is the case here, the #2 seems to be the correct adapter. Any other clues as to possible issues here? Is this just a lousy idea generally and we should try some compact Cane Creeks and barcons?
Thanks for any assistance. Any requests for extra details/pics will be answered as quickly as I can manage.