I'm 6'2" and at the end of the seat settings. Anyone over that don't fit in this car.
Did changed the wheel however. Gave me a good +2" on the arms stretch.... just feels fantastic now!
Check out
Design911 . com they have pretty decent quality steering wheels for the Boxster (fits all p cars really). The damage on those quality wheels is less than $1000 so if I were you dearest GIANT, I would just call it a day and install one of those.
http://www.design911.com/pages/productList.aspx?search=steering
** Look at the footer of this link, you can see you can get them in any finish. You would however need to contact Karl (karl@design911.com) for a Tiptronic (special order I'm guessing). Comes with F1 style shift Left(down) Right(up) flaps.
I personally got mine from another source but they are the same manufacturer. A very happy mod.... and bye bye the crooked arm thing!