This must have been something that the germans saw some merit in! Did you notice inthe two photos you were able to find that the track systems are of two different types? Seems like maybe on the Eastern front during the winter months this could have had some application of course with the roof up. That thing would be a kick out here in our California dunes. Interesting subject Luc, I'm sure one of our more promising and imaginative scratchbuilders would love to tackle this baby. semper fi, mike