Hi,
your model is going along well. A few points though :
1.the wooden slats in the troop compartment should be parallel to the vehicle hull not perpendicular,
2.the wipers engine are set a bit too high and should more resemble a box than yours. Here is a picture of the right side one.
Anyway,you're modeling from the Heller 1/72 kit and it's already a feat !
If you need more pictures, feel free to have a look at my site below.
Cheers
olivier
http://olivier.carneau.free.fr/gb_version/index.htm