I built their previous G4-Kit, the only difference seems to be the addition of a canvas roof. The doors can be built open quite easily, simply cut them apart. They are only combined in one part for a more accurate and easy assembly. To my dissapointment this kit seems to be missing the covers for the various headlights as displayed on the box picture. I had to scratchbuild those on my previous built, which was not an easy task. The wheel profile is also oversimplified and needs to be improved. Otherwise a great, superbly detailed and well engineered kit.