Cleethorpes will provide next test as Abbey Lawn side move onto national stages
Bourne lifted the Winkworth Cup for the fourth time in seven seasons after an exciting victory with just three balls remaining of Bank Holiday Monday's finals day at Sleaford.
They defeated Woodhall Spa in the final of the T20 competition by three wickets to regain the cup they last won in 2017.
But they needed to overcome a nerve-jangling final over to pass Woodhall's target of 130-9 from their 20 overs.
Spa had won the toss and elected to bat first having knocked out reigning holders Bracebridge Heath in the first semi-final of the day.
Colin Cheer made the first breakthrough for Bourne when he had Spa skipper Jack Timby caught by Rob Dunn with 13 runs on the board.
Fellow opening bowler Sam Evison then sampled his first success to have Harsha Vithana caught by Ben Woodward to leave Woodhall on 26-2.
Oliver Caswell (26) and Joe Irving (18) then put on 43 runs for the third wicket before Bourne's first change in bowling brought its rewards.
Ben Stroud struck three times in his four-over spell to claim the wickets of Caswell and Irving while also dismissing Ross Dixon cheaply, courtesy of Jack Berry's catch.
Stroud was given strong support by Dan Bandaranaike who bowled his four over allocation for just 14 runs while also taking the wickets of Henry Wilson and Alex King as Spa slumped from 69-3 to 99-7.
Tom Caswell cracked 17 runs for Spa before he became Berry's first victim as Dunn took his second catch of the final.
Dunn also ran out Alex Hodson as Spa closed on 130-9 with Alfie Lindsey unbeaten on 10 at the end of the innings.
Berry (22) and skipper Pete Morgan (26) got the Bourne reply off to a decent start by putting on 34 runs for the opening wicket.
Sam Evison (19) and Courtney Kruger (10) maintained the momentum before Steven Crossley (23) continued Bourne's charge.
Despite losing both Jordan Temple and Stroud cheaply in the search for runs, Dunn's 17 not out guided Bourne home.
They had earlier accounted for Lindum in their semi-final clash after bowling out the Lincoln side for 113 having been dismissed themselves for 124.
They overcame the second ball departure of Morgan and early loss of Evison through Berry (24), Kruger (16) and Crossley (16).
Stroud (18), Temple (22) and Ben Woodward (14) then added some vital runs late on despite an inspired bowling display from Jake Benson who claimed 4-11 from four overs.
Despite Pierce Morley-Barnes (18), Tom Lindsay (16) and Will Taylor (30) getting the Lindum reply off to a strong start, Stroud's 3-12 from four overs brought Bourne back into the contest.
Berry then bagged three wickets as Lindum lost their last four batsmen for just seven runs with Dunn's run out sealing the 11-run success.
Bourne will now travel to Cleethorpes to face the winners from the Yorkshire South Premier League in the next stage of the national competition on Sunday, July 28.
They are back in Lincolnshire League action on Saturday when near neighbours Market Deeping are the visitors to the Abbey Lawn.