How to make a pen from a “whippet” /N20 cartridge

  In Manchester, if you’ve ever been to a shabby area then you have most definitely found empty N20 cartridges at the side of the road.  They’re used in whip cream machines but I can assure you that the ones you find on the roads were not thrown away by some French chef who had… Continue reading How to make a pen from a “whippet” /N20 cartridge