Thanks for the help Sterob. Just to confirm, because I really don’t want to buy the wrong thing and trash over a years work. The one on eBay is labelled ‘Mains input’ and ‘inverter’ where the one I have removed from my machine is labelled ‘load’ and ‘line’.

Am I right to assume ‘line’ and ‘mains input’ are the same and ‘inverter’ and ‘line’ are the same? I’ve attached an image of the eBay item I’m referring to.

Click image for larger version. 

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Dan