When Brian Cha starts his 8,000-golf-ball endeavour at a driving range in Ma On Shan next month, it will not be a day out under bright and sunny skies. Instead, the fitness trainer will begin the attempt to hit his way into the Guinness World Records at midnight. Cha, 39, hopes to whack 8,000 balls in 12 hours into a target area more than 90 metres away, with only short breaks in between for a drink and a quick bite. The attempt will take place at the Whitehead Club golf driving range on February 18, from midnight to noon, under the scrutiny of an adjudicator from the Guinness World Records headquarters. With a month to go, Cha said he had achieved 70 per cent of the goal so far. "I'm confident I can work out the rest before February 18," he said yesterday. He has estimated he should hit at a pace of one ball every four seconds - and each one must land in the target area to count. "I chose this timing, and I think it's good for me. It means, towards the end of the [12 hours] when I feel tired, I can be energised by the sunlight. "The venue is quite flat and there's no headwind, so I think it's good for me," he said, pointing at the small golfing facility sandwiched between the Tolo Harbour and blocks of fancy residential high-rises. Intensive practice for the big day has led to red raw hands and inflamed fingers. Cha said he was consulting a physiotherapist and chiropractor regularly. The record is held by British golfer Steve Purdy, who whacked 7,917 golf balls in 12 hours into a target area in August 2010. He raised money for the treatment of cystic fibrosis, a genetic disease that causes mucus build-up in the organs, leading to infections and death in young adulthood. Cha's attempt will help the Redford Charitable Foundation and Rehabilitation Power.