As Conor Oliver explains, Connacht already know how to beat Leinster, but that's only a tiny part of the battle.
Andy Friend's side actually did it in some style back in January of last year, a 35-24 win at the RDS, their first against Leinster in the capital since 2003.
In their two meetings this season, both were Leinster victories and both by handsome margins - 28 points in December followed by a 37 point victory just under a fortnight ago in Galway.
Both games were marked by similar characteristics - Connacht playing well and leading in the first half, before the Leinster blitz arrived. In December's game at the RDS, Leo Cullen's side scored four tries in 17 minutes, turning a five point deficit into a 21 point lead.
The turnaround in their URC meeting at the Sportsground was even more dramatic, Connacht leading 8-7 as the clock hit 50 minutes (with 14 men), before being bulldozed for six tries in the final half-hour.
When Leinster hit, they throw combinations.
"For me, Leinster are just so clinical with the way they play," Oliver said, ahead of tomorrow night's Heineken Champions Cup meeting with the four-time winners at the Sportsground.
"When they get an opportunity they take it, that's the biggest challenge I see, it's just stopping giving them opportunities. That's through discipline, making it hard for them to earn scores, that's the main thing we need to do.
"When we have the ball and hold onto the ball we're a dangerous team, you can see it on the stats how good our rugby is when we have the ball. On the other side of the ball, that's where we need to stop momentum and stop them."
If the challenge seemed great for Connacht in what is their first ever Champions Cup knockout game, it will be even greater next week when they travel to Dublin for the return leg, with this season's last 16 decided on a home-and-away aggregate scores format.
It's a format that's largely unfamiliar to the players and coaches, and likely to result in some cagey first leg ties this weekend as teams keep their powder dry for the first half of a 160 minute contest.
That strategy probably doesn't apply to Connacht, who have to treat Friday's home leg like a one-off cup game, before even considering what happens next week. After all, David slayed Goliath, but even he didn't have to worry about doing it all over again seven days later in Goliath's back yard.
"I think you need to just focus on each game, you can't be looking ahead to the game in two weeks time," the Dublin native added.
"We've planned for this and this weekend alone.
"We think it's a great opportunity for us, having them come down here. We've done our analysis already, we're ready for this game, we're confident."
"We're excited. These weeks, European weeks are different, they're the biggest games, our biggest game of the season.
"Everyone is just excited and ready to tear in. We trained this morning, a short week with Friday's game, we're very confident in our detail and preparation. Most of the guys are just raring to get going."
"I look at this as the hardest game of the season, the most important game of the season as well. Leave no stone unturned.
"We know Leinster, we've played them enough over the last two years to know how they play, we're pretty confident on our detail and analysis on them. As they always are, they'll be confrontational, and their skillset... We're ready for a physical game, the last game was.
"We played for 50 minutes, we fell off but we showed we can stop them, and have plans that can stop them."
While heavily beaten in their two previous meetings this season, Oliver maintains they showed they could cause Leinster problems, particularly in their most recent meeting, where Connacht had to play almost an entire game with 14 me after Tom Daly's third minute red card (below).
"We went down to 14 men, we were in the game until around 50 minutes, but when you have 14 men fatigue does set in and it's hard to go 80 minutes without conceding tries.
"We do take confidence out of how we started that game, not how we finished it. That's where we have things in place where we need to get better finishing games."
Connacht know they can trouble Leinster, but if they're to stand any chance of winning tomorrow night, and travelling to Dublin next week with the game in the balance, they need to figure out how to stop the flood in defence.
"We're ready for that, ready for anything really. You need to be in these types of games.
"We're confident in our own ability, we looked at ourselves and what we've been doing wrong. We've done analysis on Leinster so many times, we know what they're about.
"For us it's about concentrating on our game and what we need to get right. We fixed a few things over the last few weeks, we found things that might not have worked, and we're taking great confidence out of the newer things we brought in, slight tweaks, and I'm pretty happy with that."
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