Exponential Curve Trellis Glich

I'm trying to create a Definition for a Wall Screen.

From the side, it looks like a 7. From a Top View, the Front Curve is an Exponential Curve. I'd like the Points to move in the -Y Direction. The Bottom Front and Top Rear can be straight.

The other issue is, as the Top Front Curve raises to align with the Top rear Curve; the Extrusion flattens. In addition, a gap between the Lower Sloped Extrusion and the Top Horizon Extrusion is created as the front and rear top series of points are aligned.

I accidently deleted screen captures within Rhino, but I can send them, if need be.

The GH definition has items Grouped with comments.

Any feedback/ help would be appreciated.

Thank you.