Step nine concerns fitment of the steering box, shaft and steering wheel, and the stub axles. This is where you can cut a few corners if you do not wish to show the engine off and close up the removeable engine bay side panels.
The instructions have you attach the steering wheel to the shaft and then the shaft to the chassis so if you follow these steps, you will not have the option to paint the cab separately. Even if you do follow the instructions at this point you are still to turn it upside down to work on the front suspension in subsequent steps, so it is asking for trouble to add it at this stage. At the very least I would advise waiting to fit it, along with the steering linkages (D6, D45 & D50) just before you add the cab assembly in step sixteen.
I like to
keep sub-assemblies separate, if at all possible, to aid airbrushing so adding
the steering shaft and wheel as early as step nine makes painting the whole
chassis rather difficult. If you want to keep both chassis and bodywork
separate, then keep both the steering shaft and steering wheel loose until you
do finally add the bodywork to the chassis.
Steering shaft and wheel alongside the idler axle assemblies



