Exploration of smoother spinning. Left one could be used in a variety of situations. 〓

Left : 

https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0837

Center :

https://www.bricklink.com/v2/catalog/catalogitem.page?id=105659

Right :

https://www.bricklink.com/v2/catalog/catalogitem.page?P=36752a

よりスムースな回転の探求。左の組み合わせはさまざまな場面で活用できそうだ。