Thunder valve spring compressor - has anyone broken one?

I recently sold the exact part pictured above (in good used condition) to another member of this forum.
He just PM'd me, and informed me "it broke" after using it on one spring.
I'm a bit skeptical, but am a stand-up guy, and will not hesitate to refund his money if he sends me pics of the broken tool.
I've used this tool before with no issues. I also have friends that have used this tool before with no troubles. (not this particular one, but the same tool).
So....has anyone else broken one of these?
It's not a bad tool, but it should not be made out of aluminum.
Still waiting on pics from him, but if that's all it is, I'll still refund his money, plus a lil extra to ship it back to me, as I can probably fix it.
Of all the simple part transactions I've done on forums over the years, I was really surprised by this one.






