I'll be getting an STi as soon as my wallet allows, but in the meantime I had a brainwave.
I am going to buy one of those DC-AC inverters that are used to charge up a laptop or other AC powered stuff from the lighter socket. I will install my PNI Silver Bullet inside it. I will use the 12V power cord on the inverter to power the detector. (in parallel with the inverter electronics)
If I can I will make it so that the inverter still works, if I can fit both the detector and the inverter electronics inside the case. I will have to find an inverter with a plastic case so it won't block the radar signal. I think laser detection is out of the question in this case.
I'd like to make it so that the detector will not power up unless I do something "hidden" like press a tiny button. Or perhaps I will make it so the radar only powers up if I have a magnet on top of the case. (Using a magnetic reed switch for a home alarm system to complete the circuit.)
If (when) I get pulled over by Officer Bacon, there will be no detector in sight no matter how hard he looks. If he gets suspicious of the inverter and takes it back to his car to test, it won't power up for him.
I'll take pictures of the construction when I get around to building it.
Let me know what your opinion is, and if you have any ideas for improving this concept.
I call it the poor mans STi.