Peter Kenington reveals 21st century methods of measuring thread sizes and his son Matthew continues his beginner's engine build with some helpful lathe advice. We have Jan-Eric Nystrom working on cab plates for his 7.25-inch gauge 10-wheeler and Rodger Bradley tells the tale of steam power in the Lancashire cotton industry. Then there's Geoff Ball making a simple but useful more taper tapping tool and Stuart Rothwell revives a 60-year idle petrol engine as a lockdown project. Oh, and much more...