Thanks guys for your comments. I hope I will keep enough motivation to the end. I'm also wondering how simulate it (i.e. turning steering wheel results to turn the wheels).
I think the difficult part is modelling each piece, not building the whole model : I gave 1x1 block 1x1 dimensions in Blender units, so it can be snapped to grid to move it easily. Just zoom in a bit to see 0.1 unit in grid (Blender grid is adaptative) and you can snap 0.1 by 0.1 (useful for vertical positions, either for blocks or axes).
I'm now on page 12 (chassis is described from page 4 to 97 included). Some improvements on pieces : retracted blocks & plates on 6 sides (0.01 unit) to have a little border between pieces, reworked each piece as I did with first ones.
C&C welcomed
