A few good precision turning components pictures I found:
Porsche Rohr 1996 911 GT1
Image by wbaiv
This photo was inspired by and I owe thanks to kahmed79:
www.flickr.com/images/kahmed79/3665934296/
DSC_0129
Valve Chest – Turning the sides
Image by tudedude
Two issues to note:
copper packing pieces to stop the jaws marking the valve chest machined parts.
The reality that my lathe tool is not the appropriate height 🙂