3D printing is not the game changer you think it is for aerospace. For each part that you are going to utilize 3D printing, you have to get that process approved by the FAA, which takes lots of time and money. You can't just say, we are switching to 3D printing for all parts. Mission critical or not, each one of those parts and the manufacturing processes have to undergo an approval process by the FAA, or foreign counterpart. For a company like Transdigm (or HEICO or PCP) that has hundreds, if not thousands, of parts / systems in the supply chain, it will be a long time before a competitor can eat away at their market share via a lower-cost manufacturing process. The playing field may start to shift away from them, but it will not occur quickly (IMHO).