My front height is already at lowest point. Also my bad on typing "rear CG" this is not what i meant, just to be clear. Just a little counter, as you are suggesting that lack of rear wing downforce means diffuser is higher...it is all good make sense but problem is that i don't have even feel the need to lower the rear if i detach the rear ARB because the car handle fine. And as you said the ARB should allow for better diffuser efficiency but it doesn't happen. So detached arb in theory should have bad diffuser effect hence if anything i should be lowering the rear with detached ARB but it is opposite in RF2, not only i gain no aero benefit of stiffer ARB on underbody but it is more in need to lower rear ride height although it should control the CG AND underbody aero better. Again not just one corner.