Nick Vale (2), Jordan Marks, Tim Zoltie and Jonny Goldstone were all on target- and boss Kristall immediately turned his attention to Sunday’s showdown.
He said: "We overpowered Oakhill, like we have done to every side this season, but we face a real test now.
"If we can win this game we will be within touching distance.
HPR are making sure no stone is left unturned for their trip across the Pennines. They made a personal check on Leeds in a bid to do their homework on their rivals.
Kristall said: "It was interesting to see HPR scouting us.
"It's clear they are bang up for this big game - just like we are."