Just to nit pick abit, the people are a bit to small, as are the M2's, and the jerry can and ammo drums are a little to big.
If you need justification,
A M3 halftrack was designed around the dimensions of the average person for the era spanning oh, the 19-teens through the war, which was about 5'4". It wasn't perfect for everyone but it was workable for most.
That really doens't mean much, just a regurgetated fact...
Anyway the front seats of a M3 are pretty cramped. I believe the driver is crouching sorta, but the cabin dimensions are to big. It might just be the angle though, but it's the same with the gunner.
For scale, the M3 had either 35" or 38" tires.
But if it's made to where it can be buttoned up, it's gonna be sweet
Oh and the anti-ditch gear is nicely done, as is the under carriage.