Coombs has played a large amount of his rugby at flanker but he has stood out in the second row for the Dragons this season, and as a result believes he can perform on the international stage.
"I'm really confident at the moment. I've played most of the season there for the Dragons," he added.
"The coaches Rob Appleyard and Iestyn Thomas have been helping me a lot and head coach Darren Edwards too has been helping me with my general play around the park as a second row.
"It was a bit of a shock to the system at first, especially the scrummaging, if I'm honest.
"[I was] getting up from the scrums with my legs just burning after putting everything into it, but I'm a few games into it now so I'm getting used to it."
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