Changing HMD acceleration

Hey together,

i’m trying to change the acceleration of the ocullus rift input for head rotation (by adding an Integer to the delta FRotator)
I think there’s no solution for this problem with blueprints.

After some searching i found some information about the PlayerController Class but
testing with changes on SetControlRotation didn’t work.

My Question. Is the HMD input directly processed bypassing the PlayerController::UpdateRotation ?
And does anyone have an idea how to solve this problem?

Thank you very much.