Trainer John Moore did not trial yesterday's first-up winner of the Caroline Hill Handicap (1,400m) because his 'riding boy' had done enough with Johnson to ensure his fitness. 'The riding boy gets all the credit - my son George has been trying to get his permit to ride gallops as an expat riding boy and he has done all the work with Johnson,' Moore laughed after Johnson was the beneficiary of a soft-lead tempo to make it four wins from just 14 starts. 'His application hasn't been successful but his efforts ensured that Johnson didn't need a trial. George gave him a good blow last week and that was enough as it turned out. I thought he might have still been a touch underdone, but he travelled kindly and then he really let down strongly,' he added. Nobody is more surprised than Moore, or jockey Darren Beadman, at Johnson's impressive record. 'Almost exactly a year ago, Johnson tossed me in the parade and injured my back, then finished second last at his first race,' said Beadman, who was not holding grudges. 'He has never stopped surprising us with how far he's come since those days. He isn't a superstar, but he makes his own luck being up on the speed - he got over outside the leader pretty easily today in the slow pace - and he tries hard. Now he's well on his way to Class Two and who would ever have expected that.' Moore said Johnson had transformed himself 'from a 22-wheel truck to a smart sportscar.' 'I never thought he was very good in his early days as a three-year-old,' he said. 'Actually, he has something in common with another of our horses who also just kept improving, Sunny Golf. 'I rode Sunny Golf in the trainers' race and George has been riding Johnson lately - I think both horses took it as a message to get their act together and win races or they were afraid we'd be riding them again.'