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I typically have the route up all the time, because I take wrong turns so often it helps get on route quick. I probably won't have dyno wheel for Badlands, I'll just take battery packs. If I do more I might get a 650B dyno wheel built, but I get that it's less use off-road, especially at my climbing speed! :S
I considered ditching the PM last year because I was struggling to find sub-compact cranks but I like the data too much.
hippy-
I like data. But my PM keeps dying off road, so I will give up on it for a bit. Plus I know what it will say now anyway, so it's a bit redundant.
I considered no dynamo for Atlas, but having a dynamo front light is good and it means I don't need to worry about lights so much. I will take a battery light too. Lights are a big one, no light and you're not going anywhere.
skinny
I like to have the route up all the time, when it's fixed route you can't mess it up or your possibly DQ. Plus the AA batteries mean I don't need to worry about charging, and given that a dynamo does not work so well off-road it is a headache removed. Also I stopped using power racing off road really, as it means less, so that removed my need for an edge.