@Dianora "EECON" looks like the manufacturer, so kudos to them. And yep, you are spot on about the arcing! I did a little post-mortem out of curiosity (and boredom) and found the telltale scorch marks and corrosion on the contacts. And while I have my doubts as to whether they'll willingly put 3D print models up for any replacement parts (I think someone would have to make them do it)... I also doubt they'd be able to stop someone from just posting them online!