both idols need to be completed and in place before the gear can be made

Oh ok, I read somewhere that you need broomsticks ro ger them, is this true and if so how do I make them, I've tried mixing some stuff but if they dont mix you lose them and I dont want to keep losing my crafting supplies

I'm maxed out on all technologies and my crafting hut is full. I've moved both idols, and inserted the polished glass in the log. Drafting up plans doesn't work, there's nothing in the crafting hut for my chief to use, and I've solved all the puzzles except the last two. Now what?