Eastbourne United AFC lifted the Sussex County FA RUR Charity Cup on Wednesday night.
Sussex County League Division One side United saw off Division Two outfit Rustington 4-1 after extra-time in the final at Lancing FC.
Brad Manton gave Brian Dennis' team the lead on the hour mark only for Andy Boxall to level 10 minutes later and force the additional half-hour.
Tom Morton restored United's lead in the 99th minute before goals in the last 10 minutes from Lee Jules and Manton sealed the win.
United will seek to make it a double on Saturday because victory at home to eighth-placed Redhill will wrap up the league title.