Aiming Help

I feel like I can’t get a comfortable grip on the Xbox Controller anymore and I feel like it makes my aim inconsistent in H5. Where do you guys place your middle finger on the back of the controller (up on the back ridge, in groove on the handle of the controller, etc…) I feel like every time I pick it up now I just can’t find a comfortable grip anymore… Maybe my hands are bigger now. Any help would be appreciated! (Sens 4, Look Accel 2)