I shoot a PSE Correra(?) single cam. I noticed at the weekend that my lower limb has developed a twist in it. Naturally, the limbs need to be replaced. Is this a common failure?

Hi, Yes, this is actually a pretty common problem among today's modern compounds. That doesn't mean every archer will experience it, but those who shoot a lot or competition shooters are pretty familiar with it happeneing from time to time. In most cases, the manufacturer will replace the limb, free of charge. -Jim