Ah thanks! I've read that the KDSS cylinders can act like they've got extension preload in them, such that they are in fact adding spring force to the side they're on (driver's). So if true this would account for the passenger side lean. The question is, what causes this? Somebody conjectured system pressure. Yet when Lexus fixes this on the GX, they replace the driver's front spring, presumable to something weaker. I'm not sure what Toyota does for the 4Runners. Regardless nobody seems to target the KDSS, except for the LC200 (I think?) where the procedure involves driving onto a spacer (on the "high" side of the vehicle) while the KDSS control valves are backed out a bit.