Spinner Graeme White says his loan spell at Northants gave him the belief to shine at Nottinghamshire.
White returned to Notts earlier this month and recorded the county's best Twenty20 figures of 5-22 in the 60-run FLt20 win over Lancashire on Sunday.
He told BBC Radio Nottingham: "It was good to get the chance at Northants. I started the competition well and taking wickets gives you confidence.
"It was about trying to prove a point and showing my worth for the team."
The win secured a home tie in the quarter-finals, which will be played on either 6, 7 or 8 August.