Of course, it's possible to produce a tutorial. Note also, that the open source vector drawing program Inkscape has a knot drawing mode.
I appreciate the links and will probably have a go but although I have used computers for years sometimes - like writing a letter with a fountain pen rather than a keyboard - I like to go back to the antedigital age. It's a bit like tying knots, a craft and relaxation versus cable ties and velcro. I was thinking more of a printed tutorial for those who either don't want to use a PC (or feel unable to do so) or want to create something hand crafted with a good old pencil and paper. Might even encourage some material for KM!
Barry