Wales Sevens captain Johnathan Edwards has urged his young side to guard against complacency as they bid for a World Cup final spot.
Four victories from Wales's five pool matches against Ireland, Italy, Poland, Ukraine and Belgium would guarantee a final spot in Dubai next March.
And Llanelli Scarlets flanker Edwards believes Wales can build on their successes in Denmark and Georgia this year.
Edwards, 24, leads Wales out for the Hannover Sevens which kicks off in Germany on Saturday, and said: "There is a massive incentive for the players. We know we've got a place at the World Cup finals at stake and won't take anybody lightly this weekend.
"It does not matter whether it's the 15-man or Sevens game, it's still a chance to represent your country in a World Cup.
"It's a once-in-a-lifetime opportunity and I do not want to let it slip through our fingers."
Coach Gareth Baber has lost Sale Sharks new-boy Nick MacLeod for the trip to Germany after the former Cardiff Blues fly-half failed to recover from a knee injury.
But Edwards insists the squad are ready to rise to the challenge and seal their place against the world's best.
"I've thoroughly enjoyed my time leading the Sevens and there have been several highs and lows this season," he said.
"Reaching the semi-finals at Twickenham and the win over Samoa were great achievements. But it is a rollercoaster ride and a two-day tournament is difficult, both mentally and physically tiring but fun.
"Sevens rugby builds up your confidence and allows you to mature as a rugby player. That's the whole purpose of this style of rugby.
"But the opportunity of playing in a World Cup has driven us on. The game is slightly different but not as big a gap as many people think. Everyone thinks Sevens rugby is an open-spaced game but every team has outstanding defences now.
"It's a huge part of the game and little errors or mistakes can be the difference between winning and losing."
WRU International Skills Coach Jason Strange is a busy man, combining the new role with that of Wales Under 20 attack coach, Ebbw Vale head coach and continuing to teach at Ebbw Fawr Learning Community.
Warren Gatland and Sam Warburton look ahead to this week's crunch RBS 6 Nations tie against France, where the Wales skipper in particular is keen to make his mark, as Paris has proved a bleak place for him in the past.
Following their historic win over England, Wales Under 20 suffered a narrow, 36-34 loss to their Scottish counterparts last weekend, despite outscoring them by five tries to three. Watch the match highlights and reaction.
WRU TV go behind the scenes with the Wales squad as they put the final touches in place ahead of the clash against Scotland at Murrayfield. Follow the squad on their captain's run, the kickers visit to Murrayfield and Neil Jenkins' press conference