You know , you have some good points for me to think on . Thank you . I shall go and take some time to look deeper into this . To paraphrase Murphys law If I find ALL solutions and NOTHING is missing . I ' ve missed something . If you make a plan and account for EVERY problem so that NOTHING can go wrong . You haven ' t checked your plan hard enough ! Or , more simply Anything that can go wrong WILL go wrong ! <| sep |> I remember programming one of these , back in the day . Hey , I didn ' t know it had an indicator light . What ? Neither did I , what ' s up with OW ! Wasn ' t an indicator light . I ' d plugged it in backwards , and the die was glowing hot . The crazy part was , that didn ' t kill it . <| sep |> yeah not really a rework but they changed a lot of things on him