The front wheels are made up of 3 parts, the main wheel, a shaft which the wheel rotates on and a spacer which goes between the wheel and chassis.

Put the screw in first, from inside the chassis, then put the on spacer, then the wheel and shaft. The washer come next then the lock nut. 

Grip the lock nut with some pliers and use a screw driver or Allen key to tighten it up. It should be loose enough to turn but not wobbly.

Use the M2.5 x 25mm screws to attach the motors to the chassis.

Then attach the rear wheels, and fix them in place with a small self tapping screw.

Now stretch the tanks tracks over the wheels.

The top lid has a quick release catch, but it helps if you can smooth the parts with a small file. 

Now attach the lid by squeezing it into the holes at the rear of the chassis.

Next attach the spoiler.

Pictures coming soon!