Walters has two runners in the Welsh Grand National on Friday, the biggest day on the Chepstow Racecourse calendar.
Jubilee Express, like many of Walters' horses, is trained by Sam Thomas.
Despite not featuring this season, he was victorious at Haydock Park on the Test ground.
Ewelduit, who is also trained by Thomas, is now a veteran after winning the race in 2021 and finishing third last year.
“I think we have a good chance with Jubilee Express, he's a young horse and it's disappointing that we haven't had the opportunity to give him a chance to run before,” Walters said.
“There are some horses coming from Ireland, which is scary when you look at a race card, but if you're not on it you can't win it.
“It's a lot about endurance, we know our horse is going to go three and a half miles, and that's what it is.”
The partnership of Walters and Thomas has already been successful this year with Lump Sum and Steel Ally coming first and second in the Welsh Champion Hurdle at Ffos Las.
“Let's hope we can do the same for the Welsh Grand National, but I very much doubt it,” Walters said.
“If we get a place we'll be happy, and as long as they come home safe, there's always another day.”