The base of crank case
The base of cylinder
The ready crankcase
The propeller's mount - hub, shaft with flange:
And test fitting of propellers mount
Cylinder's head - the most difficult part:

Real spark plug:
And my interpretation:
Real tapets:
And my ones:
Thrust box:
The stand:
and very usefool tool: side spanner for spark plugs:
Complet of parts: