Machining an out-of-round bore is easy if you're not particular about the location or magnitude of the roundness error. But accurately machining a hole that has a precisely defined non-round profile is a capability that would seem to be well beyond what a standard boring bar can accomplish.
The need to provide rapid manufacturing of low- to medium-volume production parts, and of special parts being run for design and assembly customers, was the bottom line for META Mfg. Corp. (Cincinnati).