This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/bCcs3GoZ8Gf
Keep track of wounds on your larger units. Two dials count from
...さらに表示 29 to 0
Originally designed to have the pin glued in place I find just dry fitting it holds all the parts in place as if by magic, so don't fit the pin until you are happy.
Should be a tight fit but turn easily.
If you get the first layer spreading a little, run a mold line remover around the bottom edge of the holes.
