Mike Brown insists his selection on the wing by England during the autumn rewarded years of hard work under the guidance of sprint coach Margot Wells that have produced an extra yard of pace.
While Brown is more accustomed to full-back - the position he fills for Aviva Premiership champions Harlequins - he started the last two of his 11 caps against South Africa and New Zealand on the right wing.
The 27-year-old won plaudits for his performance in the record 38-21 triumph against the All Blacks last month and said: "It did make me smile when (England coach) Stuart Lancaster said to me I'd be getting a chance on the wing."
He went on: "I've worked really hard on my pace and people still feel I'm not quick enough. Even after the All Blacks games when I felt I had a pretty good game on the wing, some said other people should be playing there.
"That's fine, whatever position I play in I want to be the best in that position. I was just really happy to get the opportunity to play. I've been working really hard over the last few years and was thankful to Stuart for giving me the chance.
"I see Margot three times a week and probably a bit less when I'm in England camp. I see her as much as I can and it's been a massive help. It's been a few years now, but it's got me here.
"I'm a lot quicker than I was before I started seeing her. She works on the technical side of speed - I run in a completely different way now to before I saw her."
England name their side for their RBS 6 Nations opener against Scotland on Thursday lunchtime with Lancaster facing a choice between Brown, Ben Foden and Alex Goode at full-back.
"I'll play any position if it means pulling on the white jersey and running out at Twickenham," Brown said. "I play full-back for Quins. That's my favourite position and is where I want to play, but I'll take it on the wing.
"I'll keep working hard and hopefully I'll get an opportunity at full-back. The positions are interchangeable in the modern game."