Those hot glue enthusiasts should probably look towards a more powerful, corded glue gun instead. • “I love this glue pen. It was given to me by my Mum two years ago for Xmas and I've used it ...

The result is a bit like a plus-sized 3D-printing pen, but much simpler and capable of much heavier extrusion. But it wasn’t quite as simple as shoving scrap PLA into a hot glue gun and mashing ...