FWIW, I've had a kind of opposite need in the past (using European plugs while in the US) and I found that the European plugs can be connected to a partially retracted (but still connected) American plug. The inner distance of the two European leads just fits over the outer distance of the two partially exposed US leads.

I mean, since this thread doesn't seem too picky about fire safety anyways... ;)

I saw someone do this with the plug to a laser printer once. The toner literally exploded in his face when he plugged it in.

That’s why you check that the printer can even support 240V before you do this

Yea I had some speakers pop using a US-AU adapter. Luckily it had a fuse I could easily replace. I tried it out with a step-down and luckily it still worked. It got stolen during a break-in a few months later. They didn't steal the step-down. I hope it blows up in their faces.

That's killing the fun though!