Sebastian Vettel plays down floor design changes ahead of the Canadian Grand Prix

The FIA outlawed the design after the Monaco Grand Prix following complaints from rival teams, despite Red Bull having its legality cleared earlier in the season.

Vettel's team-mate Mark Webber hit out on Thursday at accusations that the RB8 had been illegal in recent races.

But the reigning world champion, after saying that he was not bothered by such talk, added that the banning of the holes is not going to have a big effect on Red Bull this weekend.

"I don't care. I don't believe it has a big impact on what we do on the circuit," Vettel told reporters in the Montreal paddock on Thursday. "I think it is more important to get the tyre pressures right."

Vettel explained that while the floor design has been focused on by rival teams and the media in recent races, the team has made gains through other updates during the same period.

"It wasn't just [the floor] that came," he added. "It's more that we tried a lot of things, some things worked, some things didn't work. There's much more behind it.

"I didn't think there was anything wrong with the car we had at Monaco, or before that. Nevertheless I don't think it will make a big difference."

The German said that his only frustration about the whole saga came from the lack of clarity over what is considered legal.

"It's a shame it goes one way and the other, one way and the other. I think it's really difficult to understand what is going on. But it is as it is now."