The uploaded images here somehow looks a bit blurry than the original (maybe it's being compressed after uploading to Freelancer). The original version will have a very clear definition and can be scaled to any sizes.
Here are the changes made and also I have done quite some color variation to see which will best suited for the truck. Personally, my favorite is Draft 4C & 4G. I noticed there are some overlapping shapes between the dirt and the foot, but all these will be taken care of if everything else is fine.
The initial colorization for the toes and horn were purely grey. After some thought, I introduce a tinge of orange to the grey just to make contrast between the flesh and the toes. Others mostly are variation of lighter or darker greys.
I will be up and available over the weekends and will try my best to update any changes required. Many thanks!