Need help making an accordion grill

The difficult thing in this 3d project is the corners of the grill.

Have watch a lot of Youtube videos, both Shap3r3D and others, but to no success.

After making the basic shape (shelled solid), I did a series of split bodies. One body for the square slots and a one-fifth shortened curved body to create the long radius slots which I eyeballed then made four more copies. Although not exactly accurate, it will give you an idea of one way to create this.


Thank you so much! This helps immensely!