The next ones show the engine and the motor flange. The small engine is a Lehner 1930 out of my E-Maxx to give you an impression of the engine size. The weight is 2,2 pounds.
The front part of the flange is custom made; the rear part is taken out of a FG EVO 04. With this unit I can use the engine in the Monster as well as in my EVO 04 and it takes less than 30 min. to change the unit.