Leslie won gold in the 150m medley at the London and Beijing paralympics and is the world record holder with a time of 2m 25.98s, which is nearly 10 seconds faster than his time in Montreal.
"The shoulder is the main reason why the time isn't flash. It was hard work. Even though it isn't a flash time it is still the time we were aiming for coming over here," he said.
"I said before I came away that I'd take a win and was not fussed if it came by one second or ten, so pretty happy to come away with the result.
"It was definitely harder this time around, mainly because of how I've had to restrict and manage my workload so my shoulder could get through which meant I was a little under done. But, hey, I'll take it, a win is a win."
Leslie - Northern Advocate sports editor - describes being back on the podium as a relief.
"You never know what your competitors have been up to since an event like London so pretty happy to see not much movement in the rankings. It means going forward to Rio that I'll have a bit more confidence I think."