It only took a friend a couple of days to draw CAD lines over the kiwi I sent him.

The main requirement was that all arcs had to be centered on an intersection of lines and all straight lines had to start and end at an intersection.  This is so that when marking it out, we have the grid to work to.

The result now is this:

The plan at the moment is that each square in this drawing will end up being 1.25 x 1.25m (Approximately 4 feet by 4 feet).