Here is the doorway. If I were to do it again, I would be sure to make the doorway in the middle of one of the "A" strut pentagons for symmetry. I would also consider building the doorway inwards rather than out, even if some space is lost. The reason I chose the hard way is because I plan to build a second inner door with a vestibule.
You can see here where I laid two 24" pavers to help with the wheelbarrow. We'll see if they remain permanent.