Thistle boss Stuart Davidson has said it is important for the Barrfields club 'not to drop their guard' after their highly impressive 7-0 showing against Irvine Meadow.
Largs are making their long journey to play Arbroath Vics in the second round of the Macron Scottish Cup, and are in fine form heading into the big away trip, 2.30pm kick-off at Ogilvy Park on Saturday.
Coming off the back of scoring 16 goals in the past three Premier encounters, Largs are strong favourites, while Arbroath having been shipping in goals, losing 6-3 at home last week.
However, Davidson expects a tough assignment and wants his players to carry on their high level of display in the North East.
He said: "To me it is a testing encounter when you have to go all the way up there, and you don't know the other team involved.
"There are a lot of unknowns about this fixture, and we are just asking the players to carry on the same high level of performance.
"I don't know much about Arbroath Vics, but I have a friend who is a manager of a team in their league so I will be picking his brain on a few things.
"We need to be ruthless and get into the next round."
Going forward into the game, midfielder Graham Muir has a calf injury, while Mark Millar is still suspended. Keeper Blair Cousar is on the mend, while Alan Gilbride has been on holiday. Ryan McKie who is still recovering, is now away on holiday.
Reflecting on the stunning win over Meadow, Davidson admitted that as a player or as manager he couldn't recall having ever taken seven off Meadow before.
He said: "Performance wise, it is not any different from what we have been doing the last couple of months.
"We didn't give Irvine Meadow a moment's rest, and it is important that we are hungry all the time. 
"The difference is that we have been keeping clean sheets at the back, and it makes it easier on the rest of the team to go and do their stuff.
"Everyone is in form in front of goal, we had three forwards to start with, and then we brought on another three forwards.
"Irvine Meadow always have a good side and they have some very good players, so it was an excellent result."
New signing Joe Knowles made an impressive impact after signing for the Barrfields Club. Having featured for A-league outfit Perth Glory last season, Knowles scored twice and set up another in the final 25 minutes as sub.
Davidson said: "Joe certainly made an impression - he has goals in him and he adds competition to the squad.
"When you add Blair Docherty and John Carter to the mix, it is a lot of speed and running, and complements the good work of Scott Adam and Kevin Struthers who have been playing very well too."
With the Thistle team bus leaving Barrfields at 9am on Saturday, it is certainly an early start for all associated with Thistle.
Davidson said: "It will be a good day out for the supporters - they have been great lately.
"The numbers have been improving and the players have been giving them something to applaud.
"It was a great moment when the players were coming off the pitch on Saturday and the fans were clapping.
"It was great to see everyone happy including all the hard working committee, canteen folk, and people who work at the gate.
"Even wee Pat Rall had a smile on his face, it was good to see and everyone was deserving of it because they put the hard work in too.
"But we as a team need to show the same attitude all season. It is a marathon, and not a sprint, and we can't afford to drop our guard.
"If we can show the same attitude all season, and keep working hard all season, we can win a lot of games."