OK So I have uncovered the ruins I have the totem but when I drop the t…

OK So I have uncovered the ruins I have the totem but when I drop the totem into the gong incasement I do not get the inlaid gong peice any clues? Also I need to get the boxed gong peice but i only have 2 master builders and I have built and uncovered everything how can I build my villagers building skills with nothing left to build?