I think I have some of those diodes lying around from a previous project, I'm all for belt and braces approach I've contacted my local shop regarding the repair so I'll wait for a response.

Just a thought....my machine is in a log cabin at the bottom of the garden connected by an RCD in the house so if I leave anything on in there and then decide not to go back down I just trip the RCD. Would that likely cause an issue? It's just easier than going back down to turn it all off!

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