I like the comment "Engineers somehow found a way to cut more than 650 lbs. from the 722's dry weight." Doh, just remove the acres of padding and sound deadening, and you've removed several hundred pounds easy. Judging by the shots on page 1, that's exactly what they've done, even having removed 99% of the dash and replaced it with another one
Seems to be missing the passenger seat, but the drivers seat still kinda resembles the stock seat, except with much smaller and thinner paddings.