Once we had the outer sections installed, we measured and cut the diagonal braces and Grizz hand cut them to fit. Here's a sketch involved in how to install the diagonals...
We were discussing which way we were going to cut the diagonal, and I finally convinced him that we needed to go top center to bottom right for the R door.
and here are the finished products:
and a second view
Those suckers are Heavy, but I managed to unload them by myself tonight. I just backed the truck up to the stairs and tipped them right out into the shop.