Hi I know that is 2021 and CW is from 2014, but some days ago I thought "What if I want to make CW feets with same original pieces? And here I am. I sincerelly doubt that someone wants a tutorial, but I already did, so this is how I made. First, I separated all the pieces. Second, I made a rectangular hole on top of the larger piece. Enough for the gray piece to enter. I made a hole from end to end, so that it has an ankle joint. Third, I removed the parts that were the thumb rest, and put that part in the opposite direction. Fourth, I modified the end of the gray piece so that it can plug into the 5mm slot. And that's it. Now the piece works only as a foot, it has an ankle joint, and also, I can put it in the opposite direction, and it has a small joint in the front. I could also put some extra pieces on the toe of the foot, if I wanted the foot to look a little bigger.