Lego Technic - 8110 with XL Motor

I re-use the XL motor for this testing. Again, there are a lot of info on the web.

The XL motor is temporary mounted at the rear chassis. I did not put back all the braces/fittings. The space is just fit for XL motor. You may try with the smaller size L or M motor and it will definitely fit.

Wheels rotate as expected, without gearing down, yet. 

Further testing, for the steering, the XL motor is fitted vertically inside the cab, at the back. I did not change the yellow-knobs into gears yet, as this is just a trial. 
Also, both the motors are connected to the IR for remote control.

The result ? 

Yes, it works. But this is just pre-liminary testing. There are many pros and cons which I will list out below (that I can recall as of now):

1) Major: Need to gear down at all 4x wheels, by getting extra gears for it. Otherwise, it may stress the XL motor driving it.

2) Major: Yellow steering knob not effective for turning. Also, the far position of the motor for steering is not suitable. 

3) Major: 8110 steering design fault. Those who have one (8110), will know the difficulty in twisting the black knob above the cab to steer the front-wheel on the ground if it is not moving. Refer the video below by nicjasno (all credits goes to him)

4) Major: Without servo-motor or other manual-way, the steering does not return to centre, like the 9398 4x4 Crawler.

Therefore, these are the things in my mind for to-do list:
a) Gear down at the wheels. Simple mod.
b) Install the servo motor at bottom (lower chassis). Do not use the cab area.
c) Try to fit 2x XL / L motor to provide individual power for front and rear. I think L motor is feasible, if remove the front 4-pistons engine.
d) Modify the front steering mechanism.

Let's see how it goes along in future. I am ordering extra parts and stuff currently...