Hi Kris,
If you take a look at the diagram below you will see the 'half lenses' that are along the top and bottom of the main parallelogram or body of each of the lower five sail panels.
(It is these that give each panel its barrel cut aerofoil shape.)
Because the Weathermax80 material I chose came in a roll width of 1520mm I could not fit in the full panel.
So the solution I chose was to cut those two 'half lenses' separately and rejoin them to the parallelograms with a simple flat overlay 'seam' and three rows of stitches.
In the case of the 3 upper panels we had a similar dilemma because of the leech length but solved it in a different way.
In those panels we cut the paper patterns in half from the centre of the luff end to the centre of the leech end and then laid them side by side but with one flipped horizontally on the material as in Jasmine08s red panel #7 (counting up from the bottom) shown in the picture below.
This allowed us to cut the two halves of the upper 3 panels out of one 1520mm wide section of material.
We then rejoined them with the same simple overlay 'seam' and three rows of stitches we used when attaching the 'half lenses' to panels 1-5.
(I believe this was also done on Peregrine's 80m² Victor Winterthun designed sail.)