Raspberry Pie 4 single point balance block can not be pushed down, and one side self balance cubli block can be turned over
https://www.vogueparade.com/shopping/EN/200386159/2/1005002637655302/raspberry-pie-4-single-point-balance-block-can-not-be-pushed-down-and-one-side-self-balance-cubli-block-can-be-turned-over//