Two tries from Darryl Elliott put Hove on the way to beat Uckfield 37-10.
Chris Henderson, Ollie Phillips and Jason Hammond also went over and Martin Lovell kicked three conversions and two penalties to complete the rout.
Nick Ridley was outstanding for Uckfield, scoring a try and adding the conversion to his earlier penalty.
East Grinstead kept their Three South East promotion bid firmly on course, but only after a second half scare at Brighton.
Gs led 13-0 at the break having played against the wind but eventually squeezed in 16-13.
That result, plus victory for Sidcup, keeps the pressure on Worthing, whose game at Tonbridge Juddian was postponed.
Jim Trantham's try, plus a conversion and two penalties from Steve O'Reilly, put Gs in charge.
John Green's arrival as a back row replacement helped inspire Brighton. Green and Andy Pinnock scored tries, with Carwyn James adding a penalty, but the hosts had a James Jeffrey score ruled out for a forward pass.
O'Reilly's third penalty stretched the lead to 16-8 and that proved just enough.
The Gs goalkicker said: "It was a good win for us. If Brighton can play for 80 minutes like they did in the second half, they won't lose again this season."
Lewes scored their best result of the campaign with a 25-10 win at Dartfordians.
Purposeful running brought five tries through Ben Wood, Ross Armour, Paul Livesey, Dave Hemsley and Neil Rumble.
Skipper Hemsley said: "We have only lost one of our last four and things are starting to look a lot brighter."
Crawley are in real trouble after a 47-17 thrashing at Dunstonian. It was 47-5 after an hour, with Ed Dowling crossing for Crawley. Neil Wattam and Darren Shadbolt added late tries and Phil Howe kicked a conversion.
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