If your looking for a custom engine shop for r/c engines, it's not worth it. A cnc mill and lathe that are on the cutting edge of technology will not spend the time to do this kind of work. It's far too expensive. I worked worked at a shop for years and my best friend owned it. He pumped out shift knobs for Audi,VW and Honda and when all is said and done he can make a profit because he owned the shop but for a shop to customize a new engine it's not worth it only unless you plan on building multiple engines. I looked at building heat sinks for processors and if I were to make any money on it, you need to buy a couple of hundred parts for your it to make money. Buy from someone like OS. It's not worth it. Scott.