Hi. Quite new to composites, dabbled about a bit done lots of research online and bought some books, but after a couple failed moulding attempts I've decided to try a simpler project and reach out for help! 
Front winglets seem to me a simple project to make.
 looking at making a pair similar to what's in the picture. I could get my hands on a pair of ali ones to take a mould from. I plan on taking moulds using the Uni mould kit. Need advice on how to get both sides cosmeticly pleasing. Mould of each face and bond together with foam core? Split mould designed to be a closed mould and used to compress the CF producing one piece straight from the mould? Just need advice on this before I start making the mould as would affect the design.

Many thanks

Il see what I can get my hands on then!  

Doubt Il be playing with pre pregs for a while yet but something to bare in mind.

Am I right in thinking that the inner plate will have to be slightly smaller to accommodate the thickness of the first plate and the laminate?

For example. ( measurements for example purpose in mm)

Outer plate = 100 x 100 x 4
laminate = approx 2.5 / 3mm
Inner plate = 93 x 93 x 4

This way when all compressed the plates will match up. Otherwise if they were the same size the inner plate would stick out by 7mm.