OP you have received a lot of good advice and assistance on this but all you want to do is pick holes in everything you are told
I'M OUT!
Ok cheers, bye for now.
Telling me it's the photocell, without any explanation of why you think that, calling another engineer a pollock, etc, isn't good advice. John gave good advice and I was happy to hear it. It's called a discussion, I'm not picking holes I'm just having a conversation. Thanks for your input anyway, all comments appreciated