OK people, by George I do believe I have finally got it. I have been digesting all of this while you were all making 'zeds' and now the light bulb has finally lit.
If I understood electricity better I would have seen it earlier. Current is high when first starting and gradually falls as production proceeds. What is required is a 'current limiter' so that when enough time has passed and the process gets to the current limiter rating...that is the time to stop production. As I suggested to someone earlier, I'm sorry but I can't remember who so no offence meant, "voltage is just the means to an end". This is what stumped me on the weekend... I hooked the amp meter on and the reading never stopped, it kept...damn, I am going to have to check that again, but I think it kept going down. Now I understand what is going on. I set everything up using tap water to get instant results, or readings if you like, and the reading was changing almost every second. I expected it to remain the same. AH HA!! If what I have stated here is correct then........I HAVE FINALLY GOT IT SUSSED! I didn't realise just how 'blunt' this knife was! No good me talking to a 'sparky' as it was all goggledeegook to me. I now eagerly await your awakening with the hope that you will agree that I now know what is going on. You can't imagine my elation that I now see how damn simple it is. DUH!! I needed to have it explained it in it's simplest form. Other people I have spoken to must practice the old addage..."If you can't convince 'em, confuse 'em". I still can't believe how simple it is, if I am right. Jeez, how thick am I ?...alright, I'm not looking for an answer to that! Neville.