If I read the GNDT log correctly, Josh used the Observatory and alchemarium’s power to convert 40 caffeine into the quicksilver and cogs he needed to make 8 billboards. However, he had already dismantled his workshop at this point, so this action was illegal. Therefore, so was his victory.
The dynasty ended when the DoV passed, though, so it’s probably too late to CfJ this. Furthermore, I assume nobody has any serious objections to Josh winning, so we can just let this slide.