Thanks SD Z4MR. I will have to look at the CTEK more closely. While I was able to complete flashing the car today with my BT unit, the voltage did drop to a low of 11.6 momentarily to worry me that the flash would fail, but voltage came back up to 11.8'ish and the flash continued and finished. The flash process appeared to continually run what I can only guess was the fuel pump (whirring sound from the fuel tank area on the passenger side) the entire time. So I want to get a more powerful "tender/charger" (maybe 8-10 amps) for flashing purposes but would want something smart enough to keep the battery charged on continual use.
330indy - I will update my other
thread with more info Re: AA tune.