Burgess Hill face one of the biggest games in their history on Saturday after cruising to victory against Fisher Athletic at Leylands Park.
The Hillians, who only came up from the County League last season, will claim the play-off place for promotion from the eastern division if they beat Stamford away in their last game and Banbury lose against Erith.
Top scorer Nicky Sullivan took 19 minutes to open the scoring when he picked up a lose ball and fired into the roof of the net.
Matt Geard doubled the lead after 67 minutes, but Fisher quickly pulled one back through Hamid Barr.
Captain Ben Andrews restored the two-goal advantage with a header from a free kick and Sullivan hit his second and 30th of the season with a powerful strike 13 minutes from time.
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