Thanks everyone for all the help....I have taken everyting on board. I have ordered a toroidal psu and will wait until I get my new drivers from China. I am going to rebuild my control box very carefully. I am even looking at a different plasma machine but it does depend on what I can get it for.

It's taken me almost 4 years to get the machine built and then build up paid work for it to do.....so I have to get it running again!!