Flitwick made it four wins in a row and went third in the Saracens Hertfordshire Championship with an eight-wicket thrashing of Hemel Hempstead Town on Saturday.
The Otters began with a run-out, before spinners George Thurstance (3-45) and Nadeera Nawela bowled 35 overs between them to dismiss Hemel for 203.
Harry Thurstance (70no) and Nawela (71no) then took Flitwick to their target with an unbeaten third-wicket stand of 142.
Flitwick II remain second in Division 4A after another tight run-chase against Northwood Town.
Stand-in wicketkeeper Phil Gurney took three stumpings and a catch as Northwood were bowled out for 184, as spinners Daniel Moss (2-29), Jimmy Hart (3-32) and Sam Pitkin (2-58) did the damage.
Steven Davies played the crucial hand with 73, well supported by Dom Moxon (45), as the Otters hit the winning runs.
In Division 9A, Flitwick III dropped to third after three games without a win.
A sloppy bowling display allowed Offley &Stopsley to rack up 253-6. Although Gerald Bygraves returned with a 50, the Otters were bowled out for 169.
Flitwick were without a game in the Greene King Bedfordshire League Premier Division due to Blunham’s withdrawal.
However, Flitwick II saw off Blunham II by 29 runs at the Hardy Vale to stay top of Division Three.
Joe Bygraves bounced back from two drops off his bowling to take wickets in a fiery spell.
Isaac Malkani had given Flitwick a strong platform with 78, before Flitwick lost their last six wickets cheaply to finish on 207.
Flitwick III lost to Division Six leaders Langford II by 147 runs. Nathan Wing, Ibrahim Sheikh, Luke Smith and Nathaniel Spedding each took two wickets.