"The time was pretty average, but, at this stage, it's all about doing the qualifying time, rather than posting a super quick time," he says.
"The beauty of being the top dog and world record holder is that they set the qualifying standard around your time, so it makes life a bit easier when planning your training programmes."
Now it's all about keeping his fitness levels up and losing a few kilograms ahead of the world championships and, from next month, he will be spending two days in Auckland every week with his coach and training partner.
Leslie knows he can, and will, swim faster for the world champs, but doesn't think his world best time will be under threat by anybody at the meet.
"Judging by recent history my opposition's times won't be that much faster as we are all building up to peak at the next Paralympics [in Brazil in 2016], where everybody goes and swims faster."