My bike is ticking...

[Dead Eye]

@His Dudeness - Potentially yes, but it wasn't on for long at all. I had the system running for over an hour and a half the day before and there were no electrical smells and the box and sander weren't hot at all.

@Fazerider - Unfortunately not a wind up I'm fairly certain the dryer wasn't in operation, but its not something I'd thought of - potentially a road worth investigating.

@richfzs - The box had a lid on it that was sealed so I would be surprised if any fluid got out...