I'm retro-fitting 3rd gen seats into a 2nd gen. I was told 3rd gen seats will work for what I want to do with them, but considering 4th gen seats because they are newer and the foam is likely to be in better shape. Knowing many of you have done the 3rd gen to 4th gen swap....What is the physical size by size difference between 3rd and 4th gen rear seat bottoms? I was told the 3rd seat is 2" longer front to back, but interested to know if that is 2" past the mounting loop or in general. thx.