"But I've only got myself to blame for bowling poorly, and I know it's not going to be easy with a lot of people now putting their hands up among the test bowlers."
Southee was named in the New Zealand Twenty20 and one-day squads and was confident he has already made big strides on the delivery problems that caused a loss of form that culminated in him being dumped following the first test in Dunedin where he recorded figures of 0-140 in 36 overs over two innings.
"I've still been doing some stuff via phone and email with [NZ bowling coach] Damien Wright, just on a couple of little technical things that crept into my game," Southee said.
"It was mostly a matter of timing – I was rushing to the crease and in doing so lost that swing and wasn't hitting the wicket hard.
"They're mainly little things and I'm confident it's not a major problem."
Southee indicated in his late-season first-class appearances with the title-winning Northern Knights that he was already finding a cure.
"It was good to go back and work on it at Plunket Shield level and not have the pressure of playing at test match level but still being able to practise it in a match."
At the end of the domestic season, Southee took a break and when he returned to training, batting practice was high on his to-do list.
"I've been doing a lot of work on my batting, which is something I've always wanted to do more work on, and with some time away from playing it seemed the ideal time."
Southee, who has a test average of 20.20, wants to evolve into a consistent lower-order bat who won't just be remembered for his swashbuckling 77 not out from just 40 balls, featuring nine sixes, on his test debut against England in Napier in March 2008.
"It's not going to happen overnight, but it would be a big help to the team."