Compression arm chassis studs.

[mr v6]

I need to replace one of my compression arms, but I'm a bit wary of having a go in case one of the chassis studs snap. Just how common are these for snapping? I'd rather have a backup plan in place should it happen. 

 

Is there anywhere close to M31 postcode that could not only replace it (easy to do I know), but also repair it if needs be. I've seen a Lee Lockwood video on YT & he had a welder go to his house & weld a new section of thread onto his & it seemed fine.