I found this article that mentions CNCzone-
quote from mmsonline.com
"CNCzone (www.cnczone.com) —This formidable Web site is more of a collection of forums for machining research than a single entity, as it is broken into several categories including metalworking machines, processes and solutions, CAD/CAM software, used machinery, and more. Some forums on “the zone” may not relate directly to you as a professional; some are directed to hobbyists or woodworking folks. But the activity in metalworking’s sweet spots establishes its value. The resident search is very useful, and moderators are assigned to categories. Also valuable are sectors dedicated to specific models of machines and software. This site is well worth a bookmark for future reference."