Hi
I've decided to have a go at this engine.
It'll take me ages because of having to buy the material as and when I can afford it.
however, and for no other reason than I had a lump of alli I started on this bit.

All I need now is Star Treks replicator so I can get the other one

I really don't know how people make things like 9 cylinder rotarys and so on, 9 conrods, 9 pistons, 9 cylinder heads and, well you get the idea.
So, I shall persevere, one bit at a time and see where I get.
cheers
Roy.