Thank you for the welcome
the diffuser is from an Aston Martin V12 vantage , the V12 has lots of visual carbon parts on both the interior and the exterior
as for lining up the twill pattern its not too hard on this part as there is the natural join round the edge and as i said above the picture you have got to remove
a complete layer of carbon to the join line for the repair to blend in perfectly
its done by taping (with3 or 4 layers of flash tape) round the edge of the join area and if you look i have drawn lines on the tape exactly where the
twill needs to match up ,and then the shape of the repair piece is drawn onto a piece of folded polythene with lines drawn on the to show the direction of the stripe
then the carbon is put inside the polythene with the resin matched up to the lines
then squeegee the resin into the carbon and cut out the shape about 1cm bigger than the template
you can then peel off the layer of carbon with the polythene stuck to the top
its then possible to drop the carbon onto the part and move it around until you match up the
lines drawn on the polythene
then peel the polythene off the carbon and you should be left with it matching up but overlapping the flash tape
then bag it and cure it
when its cured you can sand through the carbon overlapped onto the flash tape without damaging the original
and with a bit of care the carbon blends in nicely to the original join
i will try and find more pictures of carbon things i have repaired