install 6x 608 bearings to each oval drive carrier and bolt top on with 6x M3x20 bolts and 6x nuts

Mount motor plate to the motor with 4x M3x4.5 bolts

Install 6802 bearings onto flex splines, and install 1st stage oval drive onto the motor shaft

Place 1st to 2nd stage spacer on top of stage 1 housing

Bolt on 2nd stage oval drive to the 1st stage flex spline with 3x M3x20 bolts and 3x M3 nuts, ensure the stage spacer is between the oval drive carrier and housing

install the output ballhead mount onto stage 2 flex spline with 3/8-16 bolt and 3/8-16 nut

Place the 2nd stage housing onto the 1st stage, this may take some effort as the oval drive carrier will need to push the 2nd stage flex spline outwards and mesh with the housing gears.

insert motor (with motor mount and oval drive installed) mount onto stage 1 and bolt everything together with 4x M3x60 bolts and 4x M3 nuts

install ballhead mount, and slide tracker onto you nearest vixen-dovetail mount. Now you are off to the races!