Thanks for peoples responses, it’s not anything to do with my Opentrack settings as my X,Y,Z still moves along the curve when the in-game view stops moving (and I don’t have this issue in other games with the same curves).
I changed these values in the 3dCkpit.dat of the blocks I’m flying like @white_fang suggested and it did what I was wanting by allowing me to lean further. It’ll be pretty crap to have to change this for every cockpit but if that’s the only way then I can deal with that.
//6DOF bounding box
movementlimit_left 0.6; // Was 0.415
movementlimit_right 0.6; // Was 0.415
movementlimit_up 0.119; // Was 0.119
movementlimit_down 0.6; // Was 0.3
movementlimit_fore 1.0; // Was 1.0
movementlimit_aft 0.6; // Was 0.6