G'day fellas, I understand this question may have been discussed a thousand times but here we go. The cause of the bow in the NACA hoods, is it from poor quality with production, wrong jig, bad fibre glass or pressure from the hood springs pushing forward onto the hood pins causing the hood to bow or is it heat from the engine bay etc etc etc or does all the above apply? I'd like to know & there may not be one answer, your knowledge & information will be appreciated, thank you.