I use two pieces. First I finish the left side and then the other side. After cure I take them out from the mold and I make all the necessary cutting and sants. Then I connect the two molds again but this time with 5-6mm distance between them. This happen because we need to be more bigger than the original. Then I put again to the molds the already panels inside and I put some stickers in the cornet to keep them in the correct position.
Finally I put geal coat again to the mold but this time in the area of free 5-6mm space. After cure carbon and all the rest you know it.