there is also the engine mount and brackets, made from  2mm thick metal-sheet,

a wider and longer, aluminum-sheet made, front platform (under the tank)

a spacer for the pinion gear,

modifications are made on the "NTC3 one-way hub" to fit the second gear axle,

and 2 custom made brackets for the canopy. 

a few holes (4)  were drilled on the chassis for the engine brackets,

and a little sanding on the chassis was needed to fit the pinion gear.