The most tricky part of this design is the fact that it is open (which is why we have called it "Open Troop Transport", of course

). This creates a problem: You cannot insert an internal skeleton to increase the stability of the front. The original vehicle had a shell of plywood mounted on a small vehicle. To add some "flesh" to the frame of the model I decided to beef the skin up with laminations. The 1/24 version will receive 3 layers and the smaller ones 2 layers. In theory a good idea but the inner skins need to be smaller with each lamination in order to fit inside. Developing an idea to do that was the reason why this thready was put on hold.
When Rhaven and I decided to tackle the Med Sled we were facing a similar issue: The stretcher was supposed to have three layers but each layer needed to be a tad smaller than the precious one. I tried reducing the size on the canvas but this did not work. Then I tried SketchUp's joint push-pull plugin. It allows you to offset a 3D shape by a specific amount and thus create a smaller version of said shape which should fit snugly inside the mother shape. On the stretcher this worked like a charm. All three layers were offsetted by the paper thickness of 0.2mm fitted like a glove:
I thought this would also be the case with the OTT. I was wrong.
I offsetted the cabin and unfolded it. RB's test failed, it was too big and the outer skin could not be closed:
I then went back to the drawing board and offsetted the shape even more. This time the outer hull could be closed but when I glued the cabin into place I noticed a HUGE gap on the nose:
That was totally unexpected. So I went back to the drawing board and after some serious trouble-shooting I decided to go the easy way and to laminate the front with coloured plates instead. That should be relatively "fool-proof" and the only way to solve the issue till I have gotten a chance to get a closer look into it again.
These shapes are 0.1 mm smaller than the faces of the front half and must be adapted to fit inside in order to avoid any bulging on the edges during folding.