Hi rhinouser141,

Welcome!

I think there are a couple methods that might give the results you want.



Here I drew some little stubby lines using Draw Curve > Lines coming off the plane to determine the angles at the G0 side. It's easiest to draw the lines after setting up a construction plane aligned with the plane by doing View > CPlane.



I then did 4x blends between the 4 ends of the 2 semicircles and the 4 stubs and Edit > Joined the stubs and blend curves to get rails for Construct > Sweep.



Finally I picked an edge curve as the object to sweep and the upper and lower rails in the second step.



- Peer