Snap Together Farm Tractor - minor mods

I made some minor mods as follows:

-Trailer connector hole moved towards the main body.
-All four cabin pillars reinforced because kids tend to hold the tractor by the roof.

STL versions attached:
Added versions full body.
Body split half and half. (less support material)
Roof split from the body. (no support material in the cabin)

Remixed from:
https://www.thingiverse.com/thing:962058
https://www.thingiverse.com/thing:2037712