try to call cen, their Tech Support is First Rate. Gabe or one of the crew should be able to get you straitened out. the Duratrax gauge has settings you can change that will give different temps depending on the setting you have it on... anodized aluminum needs to be read on a different setting than plain brushed aluminum. maybe you need to adjust those. but 400 is WAY TO HOT.
how were the temps during the breakin tanks? did you heat cycle the motor for breakin, or run teh standard procedure?
Timmahh