About this 3D model

Continuation of the paradoxical train. I made a third gable which is the mirror of others. So two identical pins on the left and one on the right. Two revolve in the same direction and the third reverses. I thought we could have a three-sprocket system that works. "Actually, it works, it's weird. The mechanics impossible. Of course, the sprockets must not turn too fast, because of the friction. Easy to print, care for finish, sprockets need to be honed for proper operation. NOP21 Following the paradoxical gear. I made a third gear which is the mirror of the other. So two identical gears left and right. Both rotate in the same direction and the third in reverse. I thought we could have three gears working system. Sure, it works, it's weird. Mechanical impossible. Of course, sprockets should not rotate too fast, because of the friction. Easy to print, cure finish, pine nuts must be laced to function well. NOP21 (google translation)