I want to replicate my K&N intake tube that is aluminum with one that is carbon. My dilemma is, do I lay up a mold from the outside or from the inside. I don't want to kill the original part to cut the mold out or off. Any ideas. The tube is 22 inches overall. It is 14 inches then bends 15 degrees then goes on about 8 more inches.. Diameter is right at 5 inches.