The Coasters made the long trip to the south coast to take on Chris Kinnear's impressive side - watch match highlights here.
And the journey was made worthwhile when Danny Rowe struck the only goal of the game and his eleventh of the season 12 minutes from time.
"It's a really, really tough place to come against a team that have a unique way of playing but a real test," said Challinor.
"I suppose from our perspective it was the perfect away performance. We've had to defend really manfully from balls into our box and were reliant on Jay, who made two unbelievably good saves to keep the score level.
"The opportunities we got, thankfully one of them drops to Rowey and you wouldn't have wanted anyone else in that position.
"To come this way against a team that are flying high in the division and win will do us no end of good."
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