It's still basically a two stroke, as each piston/cylinder takes two strokes to complete it's cycle. Just because you've stuck two opposite each other doesn't make it a one stroke!


As for the original equipment question, a milling machine with a 4th axis will manage most of the bits, however you're also probably going to need a lathe for some bits.
What you buy, will depend entirely on what size you want to build your prototypes.