Having the hexes turned up and the wheels ready, it was time to play around with the width and get them how I wanted them with the body cut out and in place.
Hexes,
The hexes come in red and black alloy and come in various widths. Also in the packet you get x4 wheel pins and x4 nuts with female threads that thread on to the axles. So it doesn't really matter if the hex passes the thread as the nut screws inside the hex on to the thread of the axle. Another fluke was the centre nut that came with the hexes match the tiny nuts on the wheels.....
The hex width I went for was 15mm by standard 12mm hex..
Click to enlarge pictures....