'Eccentric bushes' - Any experience?

[superhans88]

I've had these recommended to me by an alignment specialist to help cure a chronic pull to the left I have in my focus. It's been established that the offside front camber is too high in relation to the near side and there's nothing that can be done about moving subframe etc.

Apparently these bushes fit in the lower front control arms, curing the camber offset. Anyone got any experience of their effectiveness?

[superhans88]

The guy reckons it could be a hub carrier that's slightly bent? Nothing obvious though