Yesterday I threw in some 84a barrels on a flat washer and an 88a top (closest I could get to the ACE duros, and they different urethane so there's that), tried a 90a top and with was too stiff, 88a was much better.
Overall, it was tighter than what I normally ride (been rocking bones softs/85a all around in Theeve and Indy of late), more stable on center and has sort of a smooth looseness too them, tho that just might be the turn rather than the bushings....at 170lbs, the bones softs are super loose, unstable, wheelbite prone and difficult to keep on center for anyone riding my board other than me
That said, they were sort of comfy but again, that just might be the feel of ACES vs. the rest.