Ok, I went back to the original spline.. Trying to refine further on made it almost impossible to work with, but here's basic maxima shape so far.. I see some slight problems but need a little advice on shape (line down middle is supposed to be there, 2 halves not connected until finished basic shape)

 

looks pretty good, except the corner of the trunk lid isnt so pointy, and dont forget the liscense plate cutout in the back

 

Looks good I think ur hood windsheild angle is alittle to large close it up alittle

 

front fenders dont stick out that far

door 'shoulders' dont poke out that much

trunk lid is more horizontal

windshield and rear window arent that sloped

sideskirt area curves in more