Well, wasted a day off from work sitting around the service lounge (no courtesey vehicles, no one else to bum a ride from) so the techs could tell me:
"The floor's definitely wet, but we don't know why."
They say they have a "Leak Expert" who'll come in Friday to look at it, and since I blew today, they've arranged a rental for me to use on Friday so I can get to work etc.. Hopefully with the garden hose in his expert hands the leak will be found.
As to the water shorting the seat heater:
"Yeah, that could cause it if it got wet enough."
When asked if leaks were common in FXTs:
"First I've heard of it with the turbos."
--so not sure if its common in others and the FXT is just too new, or if the tech was just being specific.
-=-
Also, my shopvac can get the carpet fairly dry, but what can I do to keep the padding below from staying wet/getting moldy & stinky? I really don't want new-car-smell to be replaced with -wet-dog-smell, especially as I don't own a dog...
Soooo....next update Friday....