I have plotted routes for the forthcoming MK600, but when I convert to GPX, then reload, mapsource says it's not a valid file. However, if I delete the routes or convert them, or convert the tracks I made out of the routes (using WInGDB3), it's fine. However, I don't know the what the benefits of the myriad of options I have are. Given I can convert routes using the "calculated number of additional viapoint..." method, or use any of the track -> route options, which one is going to give me the most useful reminder whilst also sticking to the track? I don't want random viapoint reminders every km if possible, but I do want it to light up at junctions during the night whilst sticking to the track. I'm doing a 3am start, riding through, probably on my own for the first and last bits, so I'd like to be able to rely on the routing rather than spend a couple of hundred km gawping at the wiggly track. It's only my 2nd 600, and my first straight through, hence the slight nerves about the second night.
I've tried the "calculated additional" route conversion, and I end up with random viapoint popups, but it is faithful to the route.