My crafting hut is bulging with supplies and all my skills are maxed. I crafted a forge bucket and took it to the anvil, and I also took metal there. Now it says I need another item in order to create the water wheel pin...but what? Every guide I've read says I just need to create a forge bucket and metal.

Side note: When I played this a few years ago, I was able to get extra lavastones by watching ads. I don't know why you disabled that, but please reenable it. That was the most useful feature of the entire game. Thank you.