In reply to windle:
> Do you know why they stopped?
There is a recent thread about this which goes over some history.
> Thanks for that Dave Kerr, I'll definitely give it a go before I spend out on new cams!
Even if you can't get the cams professionally redone with sewn slings, you don't need to replace them: you can resling them in various ways yourself. Check out the various threads here on the same subject.