Last redbull romaniacs I used Garmin Etrex with reasonable results. This year, going again to the same race, I decided to upgrade and bough Oregon 450 with touratech mount. Everything went well for the first couple of months but than it start to behave. Every time the power goes off (12V USB adapter) and goes back on (like after a stop) the GPS reboot itself and then get stuck like it is connected to a computer and not to power adapter. Sometime after a 20-30 second it reboot again in normal navigation mode, sometimes it just get black out and gone. I exchange it with a new one, exactly the same thing. Obviously I cannot race that way.... Any solution? any Idea?