Progress has been slow but here is a little update for you all :-)
1) made some aluminium brackets which sit perfectly in the semi-circular rear of the body at each corner, which then attaches to the two diagonal beams from the rear of the chassis.
2) cut a boot hole and lined all the corners with sheet aluminium by using composite bond and riveting to hold it tight. This acts as a lip for the boot lid to sit on, but also adds some strength to the rear body section.
3) I have made brackets which attach each side of the boot opening to the fuel tank framework.
Overall the rear of the car is not only perfectly level giving good wheel gaps but also very rigid and strong enough to sit and bounce on :-).
Some pics below include fabricating the front join between the body and the bulkhead.
In other news i have bought a lithium ion battery to replace the heavy lead acid one, its about the size of a motorbike batter and weighs nothing.
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