So I see it has been a month since I replied. Well due to obligations to my elderly parents, aunt, and mother-in-law, I haven't touched this in a month. Today I got a chance to try to draw some kind of plan for L-girder benchwork. I have used it before, and I think it would be best here, due to the curved perimeter of the layout. I do not know how to do it differently, so I added a layer to the last SCARM drawing and put in the gray lines showing the long L-girders, the cross joists, and the almost square looking legs. Remember, with L-girder, the joists do not have to be even. There would be cross members joining the L-girder sections. I have not figured out how to put the L-girder layer under the other layers, but I'm sure it is easy, I just need to look it up but don't feel like it now. It was a busy morning at church, and after this exercise, I'm going to take a nap. I mainly want to post this photo to see if there is any discussion on the merits or how I could do it differently. Actually, the L-girders and joists show up better on top for this discussion.
Thank you for looking.