The Edgar Street crowd must have been fearing the worst when the home side went in 2-0 down at the break.
But an incredible second-half display saw them snatch the spoils from the Quakers and claim a priceless 4-2 victory.
And Richards was quick to praise the impact of Finn from the bench.
"It’s exactly the reaction we want from somebody who hasn’t been playing and starting regularly," he told the club's video service.
"To come off the bench and have such an impact it changes the game, it’s great.
"I’m just really glad he could have that end product to his game that he did have when he first came.
"He stuttered a little bit and performance levels weren’t where they need to be but he’s just shown us what he can do."
Despite being behind at the interval, Richards said he couldn't really be mad at his players after upping their game so quickly.
"First-half, they weren’t anywhere near where they have been in recent weeks, but I think you saw in the second-half where these boys can get to in terms of what they can produce," he said.
"It just shows what the boys can do when they get their performance levels right because second-half we managed to put four goals past a pretty decent team."