In most Russian helicopters (Mils) there are no differential brakes, no toe brakes. Ground taxy is done with cyclic slightly forward of neutral, tail rotor thrust for turning and fine maneuvering, and collective as needed. The brakes are applied through a bicycle lever just forward of the cyclic grip. It works very well and with a little practice you can maneuver without applying brakes.
It's a very simple system. Western helo manufacturers should look into this. They (Russians) use only one master cylinder for the brake system.