FORMER world discus champion Dani Samuels credited her new coach and new training regime after throwing 64.46m to win the event at the Sydney Track Classic.
The distance was an A-qualifier for this year's world championships to be held in Russia in August.
West Australian Kim Mickle and the ACT's Melissa Breen also produced their first A-qualifiers - all three athletes can book their seats on the plane to Moscow with another A-qualifier in Adelaide on Saturday.
Mickle won the javelin with a throw of 62.53m, while Breen won the 100m in a personal best time of 11.25 seconds - sixth on the Australian all-time list.
New Zealand's 2012 Olympic shot put gold medallist Valerie Adams thrilled the crowd by winning the event with a throw of 20.02m.
Meanwhile opposition to Russia hosting this year's world champs is growing as more of the country's competitors are caught doping.
Long jumper Tatyana Kotova and hammer thrower Olga Kuzenkova were the latest, both caught doping after samples from the 2005 world championships were retested.
That means 33 Russian athletes are serving bans for doping offences.
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