I have an Optima MK3 that I ordered from coldfrontsales on 1-30-16. I opened it to change the mode, and nothing else was touched. I also drilled the hole over the mic, but other than that it hasn't been monkeyed with. This radio has been overhead in my truck for most of the time I've had it. I haven't really cared for it because it isn't that great on am, the buttons don't light up, and noise cancelling mics don't work well with it. I would keep it if I ever planned to setup a base, but...
Optima MK3
Optima MK3