Otago and Northern Districts both enjoyed wins on the third day of their Plunket Shield matches.
Otago, buoyed by Michael Bracewell's maiden first class century, thumped Wellington by an innings and 240 runs in Dunedin, while Northern Districts crushed Auckland by an innings and 90 runs in Hamilton.
Captain Derek de Boorder (68) and Iain Robertson (27) resumed at the crease for the Volts this morning before tailenders Mark Craig (34), Ian Butler (16) and James Fuller (8no) saw them through to an impressive total of 651-9 when they declared.
The Firebirds were bundled out for 157 in their second innings, with only Luke Ronchi (49) and Stephen Murdoch (40) looking comfortable as James Fuller starred for the hosts with six wickets for 24.
The win saw Otago take top spot on the competition ladder with 77 points, three above the second placed Central Districts who have a day to play in their match against Canterbury.
In Napier, the Wizards finished at 88-1, needing another 244 on the last day to beat topple the Stags.
Central Districts posted 320 in their second innings with 90 to Keiran Noema-Barnett and 52 from deposed Black Caps skipper Ross Taylor.
Peter Fulton will start day four unbeaten on 50.
Northern Districts began the day at 530-5 and declared on reaching 614-7, the Aces managing just 284 for nine thanks to an impressive 115 run haul from Craig Cachopa.
An injury to Dean Bartlett meant he could not take his place in the batting line-up, providing Chris Martin with a spot at No. 10 before he exited with just two run beside his name.
Reece Young's 49 and Gareth Hopkins' 44 gave the Aces hope but Jono Boult took 4-37 for the Stags while Brent Arnell claimed two wickets of his own.
Auckland spin bowler Bruce Martin had a tough day at the office as he went for 3-230 off 56 overs.