Shiv Thakor and Matt Boyce both scored centuries to guide Leicestershire into a first-innings lead against Kent on the third day of the County Championship Division Two game at Grace Road.
England Under 19 star Thakor made his maiden Championship hundred and Boyce a career-best 135 as they shared a record sixth-wicket partnership of 181.
When rain and bad light forced an early finish, Leicestershire had reached 452-7 to lead by 46 runs, having started the day on 250-5, still 156 behind.
But 19-year old Thakor and 27-year-old Boyce stayed together for two sessions before Kent finally claimed their first wicket of the day with the last ball before tea.
Boyce was out lbw sweeping at a delivery from Brendan Nash - the seventh bowler used by Kent - having hit 19 fours and faced 309 balls. It was the sixth century of Boyce's career and beat his previous best score of 122 against Yorkshire last season. The stand was a Leicestershire record for the sixth wicket against Kent.
Thakor once again showed why he is regarded as one of the best young prospects on the county circuit and already on the radar of the England selectors.
He survived a sharp chance to Darren Stevens at slip off Charlie Shreck on 47, but that apart, rarely looked in trouble. He batted with calmness and patience in only his 11th first-class match, showing fine defensive technique as well as a good range of shots.
He was the perfect foil for Boyce who has been switched from opener to batting in the middle order. The change seems to have worked with the left-hander showing plenty of confidence as he reached his century off 264 balls with 15 boundaries. At times it was slow going and Leicestershire could only manage three batting points, falling short of the 350 target required by the 110th over.
Thakor, who scored 134 on his first-class debut against Loughborough University two years ago, completed his first Championship century with a cover drive for two off Tredwell. It came off 227 balls and contained eight fours.
Jigar Naik was run out for three soon after Boyce's departure, but Thakor was still there on 105 when rain swept in and ended play 50 minutes before the close.