RE: 3D slow stick power system?
It's a GWS prop - called Direct Drive or Hyper Drive. They are slightly sturdier (with squarer tips) than the other orange GWS RS props and seem to be very efficient under static conditions. At the moment the range is limited, in the larger sizes, to one pitch/diameter (8x4, 9x5, 10x6, 11x7 and 12x8). balsapr, aeromicro, aircraftworld... all have 'em.
Cheers, Phil