Returning home to New Zealand after 15 years performing in Europe has been a big step for violinist Manu Berkeljon. She talks to Rebecca Fox on the eve of her first South Island performances since returning. Earlier this year Manu Berkeljon ‘‘cast caution to the wind’’, packed her bags and with her two small children boarded a plane for New Zealand. ‘’I think it’s the dream of so many overseas Kiwis to be able to come back.’’ While a return to her home had been percolating in her mind for a while, the logistics and implications of a move that big as a single parent had been overwhelming. ‘‘As a single parent it’s been a really big thing to make the leap. And in the end I’ve sort of really just thrown the chips in the air and hopefully something will land.’’ She left behind a 14-year career in Swedish chamber orchestra Dala Sinfoniettan, where she was associate principal second violin, in Falun — a town the size of New Zealand’s Nelson.…