I'm going on a day long driving trip with my kids later this week and I kludged together a good solution of bungee cords to hold my titanium PB to the back of a seat so I can play movies for them. I got a Sony car inverter that seems to output an appropriate amount of power for the PB. On a test drive around the block with the DVD running, the PB seemed to get pretty hot, but otherwise worked fine. Is there any reason why I shouldn't go ahead with this setup? Anything I'm likely to wreck?