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Darren McQueen was a reluctant hero after scoring the goal which sent Ebbsfleet into the National League.
The 22-year-old had been on the pitch for just six minutes when he converted Andy Drury's volleyed cross from the right to put Fleet 2-1 up against Chelmsford.
That's how it finished, McQueen's 20th goal of the season earning his side promotion.
McQueen said: "On the full volley, it was a great ball (from Drury). I stretched out my leg, got a good connection and it's gone through the keeper's legs.
"It's an amazing feeling but it's not just about me, it's about the team. The goal has helped the team get up."
McQueen also came off the bench to score the winner in the semi-final second leg against Hampton & Richmond last Sunday.
More than half of his 37 appearances this season have come as a substitute, a role he again played to perfect when it most mattered.
McQueen said: "I wasn't nervous (coming on), I just took it as another game.
"Once Dave (Winfield) scored, it gave me the confidence that 'OK, the game's here to win' and when the chance came to me, I took it. My one shot - and a goal.
"My overall goal this season was 20 goals. I got 20 goals and the team got promoted so that's the main thing.
"It's fantastic because, being in and out of the team, I wasn't sure I was going to do it but when I've had chances, I've taken them.
"That's a big thing with me, I've taken the chances I've been given. It's a mad feeling."