I don't mean to sound argumentative, but where do you think his outside fender is in a turn? Account for roll and part of the suspension loses the anti-squat mid turn and can't put the power down coming out. In Darren's case that's, probably causing or contributing to the hop. Dropping to the bottom hole would help keep some AS for the loaded outside wheel. Increased roll oversteer doesn't hurt either, IMO.I wouldn't use the bottom hole for any handling app, unless the fenders at at , < 26.5" in height, and you have a relocated UCA position. (higher than OEM)
Without the tire height, it can be wildly off. My car only sits about 1/8" higher than Darren's but my tires are only 25.5" tall so our setups are very different even though we both have the same ride height and 3" lowering of the rear LCA connection. Lots of Mustang road racers use tires down to the 645 slick height...others up to 27.7" (like 275/40-19), and that's why I asked.I can usually plot suspension geometry pretty well, just from knowing fender heights. Not 100% precise, but close.