The Brumbies are aiming to keep top spot on the Super Rugby ladder and believe they are good enough to topple the Canterbury Crusaders at Canberra Stadium.

But two weeks after Queensland Reds coach Ewen McKenzie accused them of committing cynical fouls and revealed statistics showing the Brumbies were the most penalised team in the competition, they called in Bray for a tutorial. The players sat through a one-hour session with him on Friday to discuss the laws of the game and the way referees interpret decisions.

Brumbies coach Jake White has regular talks with the referees, but this is the first time the Brumbies have called in Bray to address the players and clarify the rules.

''It was just about areas around the breakdown - what the refs are looking for and what picture we need to show them to get good rewards,'' Brumbies captain Ben Mowen said.

''It was really a worthwhile experience - you want to be able to play to the rules and push it as much as you can to make good decisions.

''We are one of the highest penalised teams in the competition, but it's because we want to play up-tempo and attacking. It was awesome having Lyndon here.

''We can't expect the referees to read 10 different things and make the right decision, and that was a really good message he delivered.''

The Brumbies are playing the Crusaders for the first time in Canberra since 2009.

The teams did not meet in the first year of White's rebuilding plan because of the new Super Rugby format.

Both are in finals contention this year, with the Brumbies losing just one of their 10 matches and the Crusaders chasing another play-off campaign.

The Crusaders have been plagued by inconsistent performances and have struggled to string good games together.

But coach Todd Blackadder sent a warning to his team this week, axing All Black Israel Dagg from the starting XV to chase victory in the capital.

The Brumbies' attack hit top gear last weekend, crushing the Western Force 41-7 and scoring four tries in the first half.

With All Blacks linchpin Dan Carter leading the Crusaders, Blackadder expects a free-flowing contest. ''We're coming up against one of the best teams in the competition, and there are a few things we need to get right in our own game,'' Blackadder said.

''We've had an up-and-down season, we feel like the best is ahead of us.

''I'm not surprised by the Brumbies - it's two quality sides against each other, and let's hope it results in good-quality rugby.''