This month’s cover shows Norman Billingham demonstrating silver soldering on the Society of Model and Experimental Engineers Polly course. Inside, Roger Backhouse celebrates the Vigicentennial of the Society of Model and Experimental Engineers. Alibre Atom3D Robert Footitt brings you his second tutorial on getting the most out of your free six-month licence for Alibre Atom 3D. A Cam Grinding Machine Makers of four-stroke engines and other mechanisms needing accurate cams will appreciate this useful design from Alex du Pre. Making a Special Cutter Roger Vane goes through the process of making custom tooling. One Man and His Mill Brian Wood and the story of his adaptations and modifications to a Dore Westbury Mk II. A Chuck Jaw Assessment Device Ron Wright describes a simple but easily made accessory for checking the accuracy of self-centring chucks. Milling for Beginners This month: Jason Ballamy looks at flycutters, single-point cutters and getting the best from slitting saws. Printed Circuit Board as a Construction Medium Alan Wood describes an unusual but effective approach to making cases and enclosures. The Air2GO: Simple and portable air dusting tools. Mark Noel, the King of CamelCase, is back with another ingenious accessory. Differential Indexing John Olsen concludes his exploration and explanation of this useful technique for dividing difficult numbers. An Ikea MT2 Holder A surprise discovery in a charity shop led Mike Philpotts to a handy storage solution. Arduino: Pandora’s Box or Cool Box of Tricks? Chris Gable weighs up this popular route to embedding electronics in workshop projects. Plus all your regular favourites!