You may have already done some or all of these suggestions in the past, am a relatively new subscriber and may not have seen them.
How about a mugs guide to plastics ie HDPE, LDPE, PTFE, different types of Delrin, Acetal, Pactene, Teflon, transparent acrylic sheets and rods and tubes, (some of these might be the same stuff under a different name I wouldn't know)
links to pages like the mallet made from recycled milk bottles, the thermoformed cross slide nut, diy see through stirling engines
Optics ? There have been past articles on Mill centre finders worth doing some more ? How to make your own telescope ? A summary of what we can learn from all the astronomy chaps who make fancy things to guide their telescopes. A look at people who have made their own microscopes.
Stories about laser cutting and water jet cutting
What are some snazzy things we can make ourselves with laser beams , neodynium magnets and plastic.
Have a (monthly ? annual ? quarterly ?) mystery box event (not a competition) – give 1 guest person ( or several different people) a box with some metal, plastic, magnets, laser, bearings, and tell them to make something interesting in less than 20 hours (variations hand tools only, lathe only, mill only, cnc only, 10 hours, 20 hours, 1 hour, 100 hours – define what you want them to make ? ie laser guided pantograph)
Bill
Edited By Bill Wood 2 on 05/09/2016 10:33:50