Take everything you learned and make a profit for yourself. Use the suppliers and connections you made with ash and do your own thing with it. No non-disclosure agreement and lack of patents mean he left himself vulnerable for this. As with everything else with ash, make him learn the hard way not to screw people over.
Cheers, JBrobst
"A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing." George Bernard Shaw