Thanks for that Andy, So are 7018 ac/dc or it that one specifically for Ac?AC 7018 for you mate https://www.ebay.co.uk/itm/5kg-3-2m...hash=item2621f12709:m:mRmBbL0prP31BwG0fSGxWHg ,https://www.weldequip.com/siftrode-7018.htm I will try finding a chart I read most of them on . keep at it know mate on you flat runs check under side of the plate..
chat to view mate