Octopus Autopilot Drives Rudder Feed Back Potentiometer Module - Coursemaster & Simrad. The solution is an integrated rudder feedback unit that directly mounts to the drive unit itself. The standard RFB unit's (OC15SUK27A - OC15SUK27E) are dedicated to a particular manufacturer.Both types are attached directly to the drive unit for simple installation. Specifications for Octopus Autopilot Drives Rudder Feed Back Potentiometer Module: Manufacturer: Octopus Autopilot Drives Color: Black Package Contents: Octopus Autopilot Drives Rudder Feed Back Potentiometer Module Octopus Autopilot Drives OC15SUK27D: Rudder Feed Back Potentiometer Module - Coursemaster & Simrad