So I decided pretty much this year I was going to swap out my triple ring 105 drivetrain for a double ring 105 set up. Despite my best attempts to try and trick the drivetrain into thinking that all was well just by changing the cranks was a lesson in frustration. The chains consistent protests by riding right off the inner ring onto my BB shell no matter how much I tweeked told me I was in trouble. This all despite everything I've read on this board and even the Shimano site, which pretty much says you'll have to swap out four components, I figured I could get away with it. So now as well as changing the rear derailluer and BB I await a front derailluer from my local LBS.
In a way I'm counting my blessings as I was seriously considering Ultegra cranks to upgrade to, (which I'm told there is not much of a difference except in weight, quicker shifting and price, but I'm not winning any races so...). Therefore I would have felt compelled to get the rest of the parts to match the cranks! Everyone hear knows my dilemma in that sense, I mean the grouppo just HAS to match!
So I'm pretty much commited now and will hopefully have a nice looking well shifting 105 double ring DT by tomorrow. If anyone can learn from this is that no matter how good a mechanic you think you are, there are somethings that just won't work!
*Note the shimano website says that my shifters will work with a double or triple set up. For that I am truely thankful. Whew!