Quick update....
Well made a few small trips and just let them run while no one was back there to watch but they seem to not skip or have any issues yet. I then just let it sit in the driveway and run while I was in the garage working on another DIY Tundra project, to the end of a movie on each headrest or till the cig. lighter adapter power cut off. Which I think is around 2 hours from what I have read here. All is still working well but this is no long term test yet but just wanted to give everyone a quick update while I was thinking about it today.
still the best bang for the buck option I think......