I split it in half again as I keep making changes and it's easier to do one side the mirror later.
Moved some of the intakes around a bit and the final version will be liberally 'fettled' with a file anyway.
Going to add more of a bulge around the cockpit too, obviousl it's open to a lot of artistic licence! (Like the whole fin!)
My plan is to dremel holes in it in the appropriate places, construct a wire frame from copper wire and skin it wil ali tape.
Might actually add the holes in the cad to reduce the amount of resin and dremel time plus make things a bit more consistant.
Then using a hypodermic I'll apply a small amount of ferric chloride (Used for PCB etching) which should eat the ali... it'll eat the copper too but slower.
Wash down in lots of water to stop it when it's eaten enough... I'm hoping it won't touch the resin.
In theory....