Looks like I'm moving to Grand Junction soon. This means I need smaller gears to get my beer belly up and over the hills out there. I do most of my riding on my cyclocross bike. It should be relatively simple to swap out my cyclocross double for a triple, right. I'd need to buy new shifters, right? Any complications with mating a new 105 triple crank and shifters with a 7 speed XT MTB rear der.?