Hi Kim... Dredging up a really old thread here... I also seem to be cursed with a power connector that forces my Empeg to think it's on A/C power all the time. I know there's Hijack's "force DC power mode" function, but I'd like to have it automatically detected, such as you've described here, where it uses the presence of the tuner to decide which power it's on. Did you get this working?