I already posted about my carbon fiber helicopter boom, for that I decided I'll bite the bullet and do alloy molds. 
I also need a carbon fiber helicopter canopy. Similar shape to a football but a bit bigger and open at the back, I'll attach a pic of one. It will have pretty thin wall thickness, generally they are about a half mm, maybe .6 or .7. So only a couple layers of weave. 
I will be making my own design on fusion 360 and milling the plug on my cnc. The process that makes the most sense to me is milling each plug half (mold will be split down the middle lengthwise, right and left half) out of mdf or foam, spraying it with layers of duratec primer, sand and polish, then attach each plug half to a flat sheet of melamine or some other rigid plastic to create base for mold flanges and proceed to make fiberglass mold halves from that. I would prefer to skip the plug stage and go straight to milling the molds, but it just doesn't seem to work out as well as making fiberglass molds from a plug.  From the female molds I will vacuum bag a carbon fiber wet lay up. 
does this sound like a good plan or is there an easier/better way considering I have a cnc? Another variation would be attaching the 2 plug halves together to make a complete plug before applying duratec,  then split into 2 molds using the method shown in the air box video, but i feel that it will be less work to just attach the 2 halves to flat sheets for making the molds, just need to make sure both sheets are perfectly flat planes. 

Got all the materials coming to get going on this project. I have a pretty straight forward idea of how I'll get the plug and then molds done, but i still havent decided exactly how I'll do the lay up. I'm wondering if it might be more easy and controllable to do the 2 halves separately and after they have cured, trim them to fit eachother nicely down the middle. I can make a jig on my cnc that is a negative profile of the center line so the flange of each finished half will sit in this profile while I machine the joint line, basically just removing the flange of each half. The 2 halves will fit together perfectly. I can hold them together on the outside with packing tape while using a strip of fabric on the inside to join them. 
Should this work ok? I'm just worried that it would be difficult to do this whole shape in one shot with a decent seam line in the middle where fabric overlaps. Also I feel that bagging it effectively inside the cone shape with all the needed layers will be difficult. Doing each half separate becomes very simple, just depends how well my joining method works. If the machining of the joint doesn't come out perfect, I figure I can basically lap the 2 halves on a big peice of sand paper on a flat surface to get a nice tight joint between 2 halves. 
Keep in mind I'm a total newb at this so I'm ok with a process that takes more work but is more controllable. Also the mold will be designed in the standard way so I can try it both ways. All in one shot, or 2 separate halves. Not much material in each try so not very expensive. First try will be a single layer of 7.2oz fabric with reinforcment in strategic areas. It will be a pretty flexible flimsy part, but thats what's needed to get it light. Standard fiberglass canopies are usually 2 layers of 5.8oz. Goal is to get similar strength to regular fiberglass canopy but a bit less weight.