So I have a 2010 Trek 2.1 Triple road bike. My local bike shop persuaded me to switch my crankset out from a triple to a compact double (50/36ish - rear 12-27). I like the compact setup better and it seems less clunky shifting. The only problem is that they changed out the crankset only and re-used the triple shifters and derailleurs. On the 50 front chainring and the rear 27 and the gear below it, the chain barely rubs on the FD. Not a huge deal, but I'd prefer it not be there if possible. Is there enough adjustment with the triple shifters for a different mechanic to make this go away, or do I need to swap out the left shifter and the FD to a double setup? (or just the shifter and re-use the FD?) A different shop priced me $320 for a new shifter and FD plus labor. I'm thinking I could find one used and they'd install it for me. I'd like to go with a better rear cassette and chain later and it would seem silly to do it while it's going to rub a little.

Oh, These are Shimano 105 shifters/FD/RD. They have flight deck written on them.

Suggestions?