Speaking of weight... Just wondering if one really wanted to race the FX, how much weight could you lose, while still being functional? Just a week ago, I had stepped out of my FX while it was running (w/door open) to talk with my nephew... he looks over my shoulder and said "your door just shut itself"...Sorry to be so naive, but I had no idea it could do that! Seems like the doors, with all the power features, weigh a lot.
Of course, I'm not suggesting converting to roll-down windows... just wondering.