Own a DT 300i and am thinking about the same problem. I posted my thought's in another subject couple weeks ago. In looking at the frame of my seat there doesn't appear to be much area to re-upholster the way we would like. As I noted before, I wanted to straighten out the \ slant to l vertical to give that bottom of the slant 2-3 inches backward. Again, in looking at my seat, there doesn't appear to be that much room for that change. I have three yrs. in upholstery and hope I can come up with something eventually. I agree with you, several more inches backward would certainly give one more leg comfort. Good Luck.