I've got a Garmin 276C (bought last year), and obviously I use Mapsource. I'm planning a long ride from Ottawa, Ontario to Gunnison, Colorado in June. My question: are there any advantages/disadvantages (other then extra work) to splitting one long route into several shorter routes of roughly a day's worth of riding each? Also, do most of you turn the auto-recalculation feature off on your GPS, or not? I've generally left it on, but I wouldn't want it to bugger up my carefully-crafted work that I did on the PC in Mapsource. If I turn it off, what happens when I miss a turn in a town, for example?