so much facepalm...
tires are like mod number 1 for ANY motorsport.
except TSD rallies, then it's a cool timing computer.
Otto - 82 Benz Turbo Diesel Wagon - cruiser
Mitzi - 87 VW Jetta - low n slow
CATIA is a dirty tramp, until you figure out its sweet spots, and how to make it moan. Then its easy as apple pie on a fall afternoon.