Alright, here's some info:
setback is 0 closest to bumper, as advised, 1 is 1.75" away from bumper
pin position 1 is ~90* and 3 is most obtuse
Keep in mind that measurements contingent on my bike include a big fork - that is axle-to-crown measurement of 568mm and a large 2.3 high volume tire on there.
setup 1: rack setback 0 and pin position 3
top crossbar measures 39" from center of spoiler
tire measures 8" from center of spoiler
rear hatch opens without bikes mounted
setup 2: rack setback 0 and pin position 2
top crossbar measures 29.5" from center of spoiler
tire measures -2" from center of spoiler (guestimate) - almost fits on the 1st and 4th positions
setup 3: rack setback 0 and pin position 1:
top crossbar measures 21.5" from center of spoiler
tire measures: n/a
setup 4: rack setback 1 and pin position 2
top crossbar measures 36.5" (iirc)
tire won't fit in the middle, due to spoiler, but at the 1st/4th position, as an inch or so clearance.
setup 5: rack setback 1 and pin position 3
top crossbar measures 41" (iirc)
tire measures : way back! You can probably extrapolate,
hope that helps!