I posted here at the end of last year saying that I had replaced the lower arm on our Ka and had used a pattern part. I reckoned that as the bush on the original Ford one had started to separate at 8k miles and was completely gone at 25k, there was no way that a pattern part could be any worse at half the price.
Well I've just had to replace it again after only 6k miles which just shows how wrong I was. Mind you, I still used a pattern part again as we are selling the car now :)