GWS EDF55 &
EDF64 are not fit this motor. EDF55 & EDF64 can be used only 2mm
motor shaft. Hyperion new BL motor, P1913-06M & P1913-08M released
for GWS or other 2mm shaft EDF. Propeller adaptor must be
modified for using EDF55 & EDF64.
Little Bellanca released 2.3mm propeller adaptor for Alfa model 60/15.
It is mainly used for Hacker B20-12L.