Nash hit 29 not out as Sussex beat Warwickshire in the last eight
Batsman Chris Nash says it is about time Sussex added the Twenty20 Cup to their trophy cabinet.
Sussex last reached finals day in 2007 and will face Northants in the first of Saturday's semi-finals at Edgbaston.
Nash told BBC Sussex: "We've been very successful over the last 10 years and won championships, the Pro40, the C&G and the Friends Provident Trophy.
"We really want this one in our cabinet. We've performed well in it sporadically and it's time we won it."
Nash warmed up for finals day by hitting an unbeaten century to lead Sussex to an eight-wicket County Championship victory over Worcestershire inside three days.
Kent and Somerset will contest the other semi-final ahead of Saturday evening's final showdown and Nash believes Michael Yardy's side have as good a chance of lifting the trophy as any of their rivals.
"If you get to the semi-finals then you are a very good Twenty20 side," said Nash.
"The draw is pretty irrelevant - it is who turns up on the day. We went to finals day in 2007 with probably the strongest side on paper and lost.
"We're going to go out there and nail what we do as a team, field well and hopefully bat as well as we have all competition."
Sussex have already had a taste of the big occasion this season, albeit losing the Friends Provident Trophy final to south coast rivals Hampshire at Lord's.
But rather than dwell on that defeat, Nash believes Sussex should head to the West Midlands with confidence because of their performances in all forms of the game so far this season.
He added: "We have been fantastic all year and I think if anyone in Sussex had been offered where we are now before the start of the season we would have snapped it up.
"We have been very successful in the Championship and people might get frustrated that we're not dominating there like we have in the past, but we're fighting hard and building a new team around a new captain.
"But I think we've grown into a good one-day side, which is fantastic."
Wright ready for Twenty20 finals day
And despite returning home empty handed following their defeat by Kent in the 2007 Twenty20 Cup semi-finals, Nash is relishing the prospect of reliving the Edgbaston experience.
"In 2007 there was a really good atmosphere," Nash recalled. "Edgbaston is a really good ground and it gets quite rowdy at times, which is fun - it's like a football ground.
"Playing in front of a big crowd is always fun. I've had taste of a few big games now and I really look forward to it because it's what you play for - it's what you dream of as a kid.
"To go out there and play in front of lots of people is a very special thing.
"But we also want to win this competition because it's one we haven't won."
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