Just a reminder... the 2012 North American Model Engineering Expo, April 21 - 22 Wyandotte, Michigan. If you have never been to this remarkable event, by all means try to get there. Many, many amazing precision machined live operational engineering models, and usually several Gatling Guns of different design. This is an oppertunity to talk to the builders in person and examine their work up close. Here is a link to the site...
http://www.namesexposition.com/ Joe B