Graham Westley's focus immediately switched to next season after Farnborough Town ended the current campaign in seventh spot after a comfortable win.
Boro's final position was the second highest in their history though Westley has not enjoyed the first season back in the Conference.
Westley is keen for improvement and eager to see the season's 17 defeats is not repeated. "I haven't enjoyed this season one little bit. We haven't been winning enough, we've had some losing and I don't like losing."
Boro have picked up in recent months however and Westley added: "We've driven 19 points out of the last nine games which is more than two a game, form which would've probably won this league if we had kept that performance up all season.
"We've had to work hard to get to that level of performance and by building on it over the summer we can have a much better season next year."
Boro fans were given the opportunity to see a fifth new goalkeeper between the sticks on Saturday with Wycombe's Mark Osborn making his first, and possibly last appearance at the AIMITA Stadium.
There was also a first league appearance for local boy come good Chris Rose, who replaced Christian Lee as a late substitute.
Osborn and Rose looked on as Boro put on a decent display to end the current campaign on a high, with Lenny Piper marking his 100th appearance for the club with his 44th goal, the 15th this season.
Boro's top scorer turned sharply in the box to slam in Dean Green's shot which had rebounded into his path.
It put Boro ahead early in the second half, just a minute after Leigh had gone down to ten men when midfielder Ged Keilty was sent off for a second rash tackle in the centre circle.
Leigh had barely time to reorganise themselves when Piper struck and from thereon there was only to be one winner.
Christian Lee made it two midway through the half when his downward header from Green's cross found the net.
The impressive Tony Taggart had a similar chance a couple of minutes earlier but sent his free header wide.
Nathan Bunce rounded off the scoring when he tapped in from close ranger after Taggart had floated in a fine cross.
BORO: Osborn; Warner, C.Piper, Holloway (sub Annon 90), Bunce, Laker, Watson, L.Piper, Lee (Rose 86), Green (Hicks 82), Taggart. Not used: Benstead, Harper.
LEIGH RMI: Westhead; Harrison, German, Durkin, Swan, Keilty, Monk, Spooner (Spencer sub 82), Maamria (Farrell 76), Twiss, Hallows (Heald 51). Not used: Archer, Derbyshire.
Att: 809. Ref: M.Thorpe.
Boro's discipline again cost them dear as they were held to a 1-1 draw at Morecambe on Thursday night, after finishing with just nine men.
Skipper Steve Watson was dismissed for lashing out at Andy Gouck just before half time. Chris Piper followed in the second half for a second booking.
Boro had dominated up to then and took the lead when Gary Holloway stabbed home Chris Piper's cross on 33 minutes.
Morecambe levelled just three minutes from time through a John Norman header, though Holloway nearly pinched the points for Boro when he hit the post in the last minute.