M-23 motor car: update

Some progress on the motor car:

Now all cut-outs for windows and doors received brass frames  - for doors a simple L-shape, for windows an H-shape with one leg removed.

 The front grill below the window received a metal grid, but in comparison with prototype photos it is a bit coarse (although it is finer than that of my Overland M-24). I'll change it to a finer mesh.

 Basic boxes for battery boxes right after the front truck, the cooling device, and the frames for cooling opening on the roof were attached.

The rear truck's wheel base will be stretched by app. 7/16" - currently under construction.