Machined torsion spring

Hello, I' like to ask a question about WQS. I'm using mechanical model. There is a torsion spring in my design. But it is not cold wound, it machined. So it has a rectangular cross section. I cannot enter parameters such as width and height to WQS. I dont prefer to enter part parameters with equivalent diameters because I think that edges are also important factors for reliability of the part. So is it possible to define rectangular cross section torsion spring? Any suggestion would be appreciated.

Thanks in advance.