LME metal prices look firm with supply worries influencing trade sentiment, says Investec; copper set for further gains in Asia hours after China's largest copper producer Jianxi warns stocks are "threadbare" and unable to deliver to spot market to meet renewed demand from consumers. Nickel eyes further news on labor negotiations at Sudbury in Canada, sticks close to this week's record highs, says Investec. Tin follows similar story, awaits further news from Indonesia. 3-month copper last at $5,735/ton, +$20, nickel at $37,449, +$49, tin flat at $12,225.