Hewat was again playing out of position at Newcastle, starting on the wing rather than his usual full-back position.
Despite performing well, his replacement Steven Whittaker is more naturally suited to playing in the right full-back position.
At regional level, Roberts' route to his preferred full-back position is blocked by former All Black Ben Blair.
In between some fierce rucking there was the inevitable aerial ping-pong, an exchange that allowed James Hook to take some confidence-boosting high kicks in the unfamiliar position of full-back for Wales.
Once again, they seemed to prefer to kick rather than run with the ball, while Ugo Monye, playing out of position at full-back, looked like a fish out of water until switched to the wing.
The former Manchester City man had the option to shoot for himself, but spotted Mulgrew in a better position, and the full-back picked his spot in the bottom corner past Nicky Weaver.
Monye started the last two games at full-back, having been switched from his regular position on the wing, but was moved out of the firing line against Argentina after a nightmare first half.
The 17-stone powerhouse, normally a full-back or wing, has been training in the centre position for his region, with the new season two weeks away.
Tight-head prop Adam Jones is set for his 50th cap, while Roberts will be winning his fourth cap in a fourth different position, having already played at wing, full-back and inside centre for his country.
Smith, playing out of position on the wing, picked up the full-back's loose pass superbly on the run and had the pace to beat the cover and cross out wide, with Goode narrowly unable to add the conversion.
However, since the past year, Carbi-Tech is now back to full capacity at 15-20 employees and is in the position to hire more.
His versatility allowed him to play in every position along the backline from fly-half through to full-back.
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Uncapped Priestland has also played full-back for the region this season and admits that while not keen on that position at the start of the season, he would not turn down the chance to play there for Wales.
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England coach Brian Ashton has named Cueto at full-back despite the 27-year-old having played only eight times in that position for Sale.
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In the summer Wales caretaker coach Robin McBryde said Hook's best position had not been settled, the Ospreys having used him at full-back in the past and also outside and inside centre.
"We've got to be in a position where he plays a full nine innings of defense, and be able to do back to back (games) and all this other stuff, " Cashman said.
Hook could be set for another position, though, having moved from centre to replace Byrne at Leicester when the full-back went off injured.
Coleman, who normally plays at right-back, was full of purpose on the right of midfield and he quickly adjusted to the demands of his new position as he made his first full Premier League start.
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