Star D Services, LLC
I, Cooper (Owner of Star D Services, LLC) hung each and every one of those mounts and pictures etc. Every few Months or so I go back to take down the smallest ones (or whichever the customer wants) and swap them out for his son's newer bigger mounts. Always adding to the collection. The mounts are not a millimeter off from one mount to the next or from one wall to the next.
I don't have pictures anymore from 2015 but we also helped a Master Carpenter and planed and installed the wood floor as well as much more carpentry work to complete the building.