The seating position has also been raised in the new car — occupants sit 36 mm higher in the front and 64 mm higher in the rear compared to in the E84, and increased headroom, shoulder room and
elbow room available to all occupants is also touted.
Following Roy's recipe, you can get a reasonable - looking fit to data with very little fine - tuning because Roy has given himself a lot of
elbow room to play around in: you have the choice of any two variability indices among dozens
available, you make an arbitrary linear combination of them to suit your purposes, you choose whatever mixed layer depth you want, and you finish it all off by allowing yourself the luxury of diddling the initial condition.