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Fleet boss Daryl McMahon insisted he wasn't worried after conceding the first goal again on Saturday.
It was the fourth time in six matches that the Fleet have been behind but they bounced back in style to see off 10-man Welling.
"The whole play in the first half we were getting in between them," said McMahon, whose side have trailed to Hampton, Weston and East Thurrock in recent weeks.
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"It was just about scoring the chances we were creating. It was a good home win and a good scoreline.
"I thought we were very good after going one down. We had good composure, created a lot of chances and deserved to be 3-1 at half-time.
"They couldn’t get out really after the first five or 10 minutes and were boxed in their own half after a good start by them to be fair.
"Darren (McQueen) had two or three attempts and on another day he could have scored them and as everyone knows goals change games.
“I’m most pleased with the first half because we showed good quality in getting the ball down and passing and we believed in what we were good at."
McMahon did not see the handball where Fleet were awarded a spot-kick but he felt the referee had already missed two incidents earlier in the game.
He also felt the official was right to show Welling's Danny Waldren a red card for a professional foul on Darren McQueen.
“Someone on the bench said it was three handballs for one penalty!" said McMahon.
"The one before the penalty, when Darren won it back off the lad and it went off for a throw-in, he handballed that as well. I couldn't see the last one but the first one was a definite penalty.
“It was a definite red. There’s nothing you could do about that. He’s left Darren who was going to do him one v one and he pulled him back."
McMahon added: "They probably shouldn’t be where they are in the league when you look at the names on paper but I think we ran out comfortably in the end and we deserved it."