Sam Scrimgeour and Mark Aldred had never raced on the world-famous Rotsee until this weekend. Their only previous view was from website footage.
This afternoon they made the lake in Lucerne their own with gold in the lightweight men's pair.
"To row here is a dream come true in itself. To win here is amazing", said Aldred.
The duo paced the race to perfection, coming through in the final 500m to take the lead from Spain and Switzerland.
Scrimgeour paid tribute to his crew-mate's pace-making in the stroke seat. "Mark is the ultimate pace-maker", he said. "He just takes us out at a steady rhythm and sensed when we needed to pull away".
The duo were not fazed by the greater depth in the field here. "We were quite disappointed with the small entry at Eton Dorney for the last world cup", said Scrimgeour, clearly pleased that they could take on all-comers here.
Jamie Kirkwood's blistering sprint finish took him into today's final of the lightweight men's single scull from the morning semis.
This evening he came close to a podium place, using the same finishing speed but ended up fourth in 6:55.80 in a race won by Poland. Kirkwood had also led the early phase of the race.
To the delight of the home crowd Switzerland took silver and bronze in this race.
Ruth Walczak was just short of the podium too with a fourth place in the equivalent women's event. The sculler from Rochdale was third at 500m but lost out to South Africa's Ursula Grobler for bronze. Brazil's Fabiana Beltrame won in a time of 7:34.33 unleashing a little foretaste of Rio 2016 on the banks here as her supporters celebrated.
Walczak can take confidence from the fact that she finished ahead of Canada's Patricia Obee and New Zealand's Louise Ayling - both of whom beat her in the morning's semi-finals.
Earlier seven British crews qualified for tomorrow's world cup finals session, joining the three that had come through.
"With our finals qualifications that we have a good depth across our team and we have found the standard here higher than Eton Dorney as we thought. Medals will be tough to win in tomorrow's finals", said Sir David Tanner, GB Rowing Team Performance Director.
GB's four Olympic champions will feature on tomorrow's race card. Helen Glover races the women's pair with Polly Swann whilst Andrew Triggs Hodge, Peter Reed and Alex Gregory are all in the men's eight.
The British men's scullers were in good form today. The quadruple scull showed well behind the Olympic silver medallists from Croatia to qualify and the men's double of Bill Lucas and Matt Langridge had a good day to win their repechage. Alan Campbell was second in his semi-final for he men's single as were his Coleraine counterparts Peter and Richard Chambers in the lightweight men's double.
Britain's other qualifiers were the lightweight women's double and the lightweight men's four.
Vicky Thornley narrowly missed out on a place in the final of the women's single scull. She will now race a B final as will the second GB men's eight, the women's quadruple scull and the men's four. The latter could not match their Henley and Eton successes here.