Swindon Robins team manager Alun Rossiter says his side were "first-class" in their play-off semi-final first leg win over Birmingham.
The Robins, who finished second in the Elite League table, secured a 55-35 victory at Perry Bar to take a generous lead in to Thursday's return leg.
Peter Kildemand top-scored with 14+1 paid maximum, while Troy Batchelor also starred with 13+1.
"It was a first-class performance," Rossiter told BBC Wiltshire.
"We were confident coming in to it but we had to make sure we did the job, and we did the job professionally."
Should Swindon retain their lead after the second leg they will book a grand final spot against Poole Pirates, who claimed a 108-73 aggregate win over Lakeside on Monday.
But Rossiter says his side will not take their 20-point advantage for granted when the Brummies travel to the Abbey Stadium.
"If we go in to the meeting complacent then anything can happen," he added.
"We've got to be respectful and make sure we don't slip up.
"We need to remember what happened in the Ryder Cup; nobody said they would do it and they came back.
"This is just the first half at the moment."