Collingham captain Sam Anderson reckons his side have refound their fighting spirit.
The reigning Aire Wharfe champions reminded the league they were not going to give away their crown without a fight as they jumped to third on Saturday.
The Harewood Laners saw off Harden comfortably as they chased down a target of 197 with seven wickets spare.
And the Waddilove Cup holders then advanced through to the quarter-finals on Sunday as they edged a high scoring clash with Kirkstall by four wickets.
Steve James ousted four victims as Collingham’s attack all pitched in to restrict Harden to 196-9.
Toby Jacklin and John Swain both struck half-centuries in the reply before Ollie Hardaker smashed a rapid 36 to coast the side home.
The win rose Collingham up to third but they remain 16 points behind leaders Beckwithshaw.
Captain Sam Anderson praised his troops for turning around their poor start to the season.
“We are playing good cricket now,” he said.
“The team is together. The dressing room is a better place.
“We need to put some pressure on Beckwithshaw. They will lose at some point and it will be how they respond to that.”
Jacklin was again the star performer against Kirkstall but this time with the ball as he took 3-11 from nine economic overs.
Dave Girling added 3-63 as Kirkstall were bowled out for 209 on their home track.
Swain (38) and Jacklin (25) led the chase before Girling (46) and Ryan Sharrocks’ heavy hitting 38 not out wrapped up the progress.
Anderson’s side will meet high flying Burley in the quarter-finals.
The skipper added: “It was a really tough hard fought game. We just came out on top.
“You have to win the close games. That is what last season was all about. We were known for winning the tight games”
Collingham host eighth-placed Steeton this Saturday.
In Division Two, a late flurry of runs failed to stop Bardsey slipping into the Aire-Wharfe Division Two relegation zone.
Sameer Manjrekar’s side succumbed to fellow strugglers Bolton Villas as they fell to a 33-run defeat.
Villas posted 230-9 before bowling Bardsey out for 197.