[BrianG]

You shouldn't shorten leads on motors like Feigao, Neu, etc because the leads are just extensions of the coil wires, and only the last inch or so has the varnish removed for soldering. It's almost impossible to solder to varnish-coated wires without somehow removing that layer.

Motors like the Mamba max motors are ok because the leads are just regular wires. The connections between the coils and the leads are done inside the motor. The CC Neu motors look like they fall into this category.