Next I tried working in a muffler factory but that was exhausting.
______________________________________________

I'm afraid I need a translation here.... Is a 'muffler' what we (Brits) would call a 'silencer'?

I thought the other ones were great - it was just that line I couldn't quite make sense of!

I guess I would have to go for: I used to work in publishing, but kept having trouble with the fine print.