I'm trying to figure out if I would fit in a 456, and jumping in one to see isn't possible for awhile because there aren't any where I live. I have driven a 575, and it is way too small for me. The rake of the windshield alone makes the car not work. I look straight at the sun visor. The 612, which I have also driven, is another story. Except for my leg rubbing on the driver's door armrest during a lengthy drive, I fit like a glove (and what a wonderful car). I wonder, however, about the 456. I know it has less interior room than a 612, but I have modified seats, arm rests and counsels to fit before. But if the windshield is raked like the 575, it just wouldn't work. Is anyone familiar enough with the 575 to compare it to the 456? Thanks!