richjp and others ............. Seems my comments earlier in the year were justified. Whatever anyone says, it order to survive NNG has to ACTUALLY make sales of kit, AND get paid. This technology is moving at a rapid pace. I expect someone is already developing/manufacturing something better and at one tenth of cost ! Leave this stock to the money men and concentrate on other shares; if you can't make money in the current market from less risky shares, then pack up and go home !! Merry Christmas