Although the second link's harmonic gearbox components and durability test harmonic gearbox components were not completed by the RPL over the extended weekend, the miniature harmonic's parts are complete. The above video shows the miniature harmonic driven by an MX-28 servo. It proves the gearbox is functional, but it is ailed with motion roughness like its parent gearbox, which may also be assuaged by a resin bearing holder.

The base has increased in height to accommodate a harmonic gearbox with axial bearing driven by an MX series servo.