The reconstruction is quite an endeavor. Looking at all the modern scaffolding and temporary supports makes me marvel even more about the ingenuity and mechanical acumen of the original craftsmen and fabricators! They did not have the luxury of modern scaffolding and falsework with its standardized shapes, sizes and known load capacities. Their falsework was a lot of hand-hewn timbers, assembled with hand-forged pegs/nails, and a lot of rope, all erected using human strength, tackle block pulleys, mechanical advantage and few draft animals on turnstiles. No electrical lighting. No power tools or diamond / carbide bits or blades. No computer modeling or laser scanning. Totally amazing engineering and construction. Of course, their schedule was on a completely dfferent time scale as were the labor rates!