Manby's first outing at Ally Pally last week saw him beat Cameron Menzies, prompting the Scot to punch his table in frustration. On Monday evening, there was no such reaction, but the result was the same as the 20-year-old from Huddersfield made light work of his American opponent.
Manby only dropped one leg in total, and averaged a shade over 90 to earn himself a spot in the third round, where he will take on Rapid Ricky Evans.
"Absolutely buzzing," Manby told Sky Sports. "It's not the prettiest, it's not my A-game, but it's good enough for tonight.
“I just want to come up here and play my own game, and I think I did that quite well tonight. I just want to play my own game, and it's all a free shot.
“If I win, I win. If I don't, I don't. Everything's just positive at the minute.”
Manby's win came after Luke Humphries had demolished Paul Lim, after he also dropped just one leg against his opponent.
Lim was an unsurprising crowd favourite for the raucous Ally Pally crowd, but there was no sentiment from the ruthless 2023 champion, who went 2-0 up with 71-year-old Lim only having had one shot at a double in the six legs he lost.
However, the world number two dropped off his intensity enough for Lim to snatch a leg to make it 2-1 in the final set, before normal service resumed with Humphries mopping things up with a 79 checkout on D11 to secure a showdown with Gabriel Clemens after Christmas.
"I had to come out and fight him because the crowd were going to be on his side, I knew that," Humphries told Sky Sports.
"When I went 2-0 up, everything was going well. Obviously, the third set wasn't as great, but I kind of didn't want to destroy him 9-0.
"It was just a pleasure to play him again. I'm a fan of his. Unfortunately, he played against me and I had business to do tonight.
"That was the most amazing atmosphere I've ever been a part of, when they were calling his name out, it was the loudest I've ever heard."
Earlier in the evening, Gian van Veen beat Alan Soutar 3-1, while Nathan Aspinall saw off Leonard Gates 3-0.
"I felt a lot better than the first game," Aspinall told Sky Sports. "Leonard is a lot better than that. I expected him to throw a bit more at me.
"I've dropped one set in two matches, but I've played pretty average. I've tried to enjoy my matches.
"This crowd is unbelievable. Every time I play here, they give me great support, and it was amazing here tonight."
Aspinall will face Kevin Doets in the next round, after the Dutchman had ended the journey of another crowd favourite in Kenya's David Munyua.
"Kevin's a great player," Aspinall said. "I don't have a great record against Kevin and I think he knows that, because he's been talking to me in the hotel, but rest assured, I will enjoy Christmas, then come back and put a show on for this crowd."