A much improved display was required following a first league defeat of the season against Loxwood; and United produced that.
There were four changes to the side that started against Loxwood, with Bailo Camara, Charlie Osborne and Adam Davidson all starting, while there a debut for Acer Wake in the heart of the defence alongside Dan Pollard.
Tate had an early sighter at goal, but his curling effort was too high to trouble Buss in the visiting goal.
A downward header from Craig Bunch was the closest that Newhaven came to troubling the scorers, before Wes Tate struck for United.
Tate and Camara linked up on the left hand side, with Tate finding room just inside the box to strike a low drive in a the near post of Buss.
Russ Tanner had to be quick off his line to thwart Lee Robinson five minutes later as United went into the break holding their lead.
Osborne came close to doubling the lead after some tricky footwork saw him beat Buss, but the angle proved to be too much as he lifted his effort over the bar.
The game changed on 69 minutes as debutant Wake was dismissed for a professional foul after the referee had consulted his assistant.
Aaron Capon was denied by Buss four minutes later, moments before a big decision involving Buss.
A ball over the top saw Osborne through on goal, but Buss rushed out of his area and scythed down the youngster. Despite being the last man, the Newhaven 'keeper was only shown a yellow card
Newhaven were also reduced to ten men with two minutes left as Bradley Murray recieved a second booking for comments made to the referee, but United were to suffer a sucker punch deep into time added on.
A free kick into the area was only partially cleared and a scramble ensued, with Ryan Knight the man on hand to poke the ball past Tanner and rescue a point for the visitors.