I recently converted my rigid Trek 930 into a commuter. The conversion was basically replacing the handlebar with a drop bar, road brake levers, Dura Ace bar cons (mostly roads on the commute). Didn't want to fool with the drive train so left it as it was.... LX rear and STX front derailleurs. 7 speed XT rear hub. Just using friction shift mode on the rear. All works well, except one small issue. No matter how well I adjust the front derailleur (want the use of all 3 chainrings), I get a small amount of chain rub in the smallest 2 cogs when on the large chainring. Any attempt to tune this out screws up the ability to use the small chainring. My guess is the Dura Ace shifter doesn't take up enough cable to pull the derailleur outboard quite enough.
Anyone else try this? Suggestions appreciated!