Alas, while using up the remaining floor plates, bulkheads, and plasticard, it turns out I am going to be...."shy" a few bulkheads. Two of the large buildings are expanded to be 11 floor plates if you count the bottom ones. I have had to cannibalize some of the bulkheads from dome wall sections to complete the buildings, and have found a reasonable source of 0.080" plasticard. This leaves me with too few bulkheads for dome wall sections between the buildings, necessary to keep them far enough apart so you can reach into the interior. I can alternate buildings on either side of the dome wall section, stretching them a bit but shortening the dome wall length to 4 -5 foot instead of 9 feet. There are such challenges...sigh... Buildings at 30 inches tall, they need to be connected to each other for stability. I can't justify more than $1 each, but I need 50-100. eRip hasn't had a lot that size for a long long time. Custom wall sections are pending I think....