Might help you to know that this Series One intake running on my car was a 10% fill. 100% fill means its a solid piece with no gaps or empty structure inside. We plan on having the general walls around 30% and the corners, fasteners and matting surfaces at a higher fill. In some places it will be 100%. Again if all manufactures are using plastics and nylons to make intakes already, then nothing we are doing is new. Actually the material we are selecting to use currently is over kill in the durability department for what its getting used for. We could easily do without the carbon fiber fill and make our printers happier without it.I’m not jumping on the bandwagon of kicking the hornets nest, but I too had a question in my mind when I first read about this as to the plastic that you’re printing with…. Is it durable enough to support the weight of, gravity ,vibration, of dual carburetion an air cleaner assembly and linkage….will it remain flat and True……..I know they said that composite decking will not curl, will not warp, but I’ve seen those results ……….