WW2 - Field Defences

This was going to be an Anti-Tank ditch 10" long to use with BG Kursk.

 But now I have made it I am not so sure.  It might now become part of a trench system instead and I will go back and redo a ditch along the lines of one of the photos in the Blood, Steel, and Myth book. I think my issue is that my ditch is too regular so that could be addressed.  The other way would be to change the angle of the banking.  However, that would require a different construction approach and I am not sure of what materials I could use that would still keep this with a reasonable low relief.