James Hook is ready to flex his new muscles to nail down the number ten Wales shirt. after working flat out in training and adding almost four kilos in muscle.
Now he hopes that bulk can help give him the edge over rival Stephen Jones when it comes to facing the world's best in the Invesco Perpetual Autumn Series.
Hook said: "There's a lot of competition at fly-half but it's now time for me to step out of the development stage and do it for real.
"I've been working hard and got huge gains from doing weights, speed and fitness work. It's the strongest I've ever felt and I'm really happy.
"At the Ospreys we've been pulling trucks and flipping tractor tyres during pre-season which was good fun. Our new fitness coaches Alex Lawson and Mike McGurn have been great and we're being monitored all the time. The fitness work has really benefited us."
Hook has found himself bowing to the experience of British Lion Jones for the coveted number ten jersey under the tenure of Warren Gatland.
But the 23-year-old showed his versitility at full-back on Wales' summer tour against the Springboks, when Jones retained his place, and Hook says that fighting for his place in the side is perfect motivation.
"Competition between Stephen and myself is nothing new. It's been there for the last few years. But I only played 18 minutes at fly-half in South Africa and now I need to impress.
"What I do at regional level will count for Wales selection and the Ospreys have some huge games early in the season. So my aim is to send a message to Warren by producing some good performances. I really want to start against South Africa on November 8."
Wales face all three southern hemisphere giants - South Africa, Australia and New Zealand - as well as Canada this November. And 27-cap Hook believes Wales can claim a major scalp.
He added: "We've got to take confidence from the Grand Slam and the way we matched South Africa in the second Test on tour. So we know we're not a million miles away from success against them."
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.