Hey, new step. Thought I'd let you all know.
With the addition of the USB wheel, I began thinking about some problems. For instance, I'm in Miami, where even the movie theaters have valet parking. I dont want some valet screwing around with my system. And then there's the vacation problem. If I'm away for a week, I dont want to come back to a dead battery.
Solution: Switches galore. I have 3, 2 of which are up front in the dash and a third in the trunk by the computer. Of the two in the dash, one kills the power to the lilliput, which is good in case of the occassional ghosting. The other in-dash switch interrupts the ACC/IGN line going back to the computer. So if that switch is off, the computer thinks the car is off. So when I roll up to a valet, I kill that switch and the computer turns off and stays off even if the car is shut off and then restarted, it stays off until you flip it back on.
The last switch in the trunk is a master power kill. If I'm going on vacation, go to the trunk and kill it. That way there is no trickle-drain over time!