[MetalJacket]

Originally Posted by Bryce Paputa

We can't go all the way to the outside because we have to put the axles, wheels, etc. up through the bottom.

If you wanted to get a little extra strength out of the belly pan, you could try something like in this picture

Not sure how much space you have between wheels but doing something like that will let you extend the belly pan farther out but still allow you to put the wheels in through the bottom