Yes, that a good one, especially the part about tension. Start practising on paper until you get it right and then on a patch of ripstop. I leave no guarantees whether paper will eventually make the needle go blunt or not. However I have done rather much paper sewing stitch practice and then checked the needle tip in a microscope by comparing it to other needle tips without seeing any bad effects.
Here is the same document in two other addresses:
https://web.archive.org/web/20180524030645/http://dako-club.tripod.com/kitesewing101.htm
https://sites.google.com/site/kites4all/home/kite-sewing-101