This has probably been asked.
It would be good to have an option to lock the infill angle to the part/model. Maybe it is an option such as "same as top/bottom" angle which I believe do follow the part rotation.
This is especially handy if you need to rotate the model on the Z axis some for better fit or other reasons.
It is a bit of a pain, especially if you forget, to go in and change the infill angle (rectilinear) to try to match the rotation on the part.