Did not saw many people creating a 6 axle version of this. Tried to do something on my own and so far i'm impressed by my doing. First time I do this without using someone elses instructions :) Expect for making it an ultimate.
This is not the final version of the body. The engine block is a V12 (2 * 6), like the 8421XL. Needed to move the infrared receivers closer to the turret or I had to buy more extension cords for the motors.
Had to think something to fill the gab under the engine block to make it more sturdy. All left is to create a longer boom. Not wanting to follow the XL boom that is already out but trying to create something that has the same look as the current one.