Grayshon, 28, who joined the club from Harlequins in 2010, insists Rovers are focused on securing their place in the Championship Grand Final at the first attempt.
He said: “Our thoughts are entirely on beating Leigh this week. We know that they will have something to say about that…well that’s fine. We know what they are capable of, but the main thing is that we know what we are capable of as well. We have a signal to send out this week about our intentions and that’s where are minds are at.
“Leigh beat us at the LSV and we drew with them at home-a game which was very winnable for us. So there’s a record to be set straight there-we underperformed both times.
“Getting to the final means a lot to us and the Centurions. It’s a no brainer-you can’t beat playing in big games and that includes Thursday’s game. It’s the same for everybody, but we have the added element of the way we lost last year’s final to drive us on.”