i'm not at all interested in speeding, i am however an electronics engineer, and i work for a large electronics company and can source stuff at cost, including custom LCD's. I like a challenge, there has not been one effective solution for blocking plates covertly. i'm pretty sure i can come up with an elegant and simple low cost solution, which i will sell via the web and supplement my income. thats all, if it works and is not snake oil it will sell, current cost projections come back at around $320 sell for a run of 500.