Been lurking for awhile. Great site full of information. I've been in the Automotive/Racing Engine field for over 20 years and have now branched out into 5 axis CNC Head porting and have recently started some short run CNC work for a large Tool and Die company. I went to school and became a Tool and Die apprentice about 25 years ago and learned the basics. From there it has been all self taught. Always looking to learn! Jay Roeder