"I'm feeling pretty good now, almost five months since the surgery, and I'm gradually building into the contact work. I now need to get involved in some tackles and scrum training, basically things that can potentially niggle it."
Before treating the bulging disc around his C5 and C6 vertebrae, Boric consulted former professionals Olo Brown, Derren Witcombe and Dave Gibson, who had been similarly afflicted. Boric chose disc replacement surgery over fusing the vertebrae.
"I'm the only one in the country who has had that done but a couple of English players went through it. The fusion option makes sure it all comes together and is rock solid. They take bone from your hip, put it all in and lock it in place. The problem is it can put pressure on the discs either side. A replacement should work like a normal disc."
Boric's time away from rugby gave him perspective on the rigours of a rugby-playing life: "To be honest, I wouldn't say I was desperate to return. I weighed up whether it was worth throwing in the towel. The main reason I had surgery was to feel confident that I have got a good neck and wouldn't have any pain going forward."
The down time saw Boric pursue the engineering career he put on hold for rugby.
"I enjoyed a couple of months at project management and construction companies. I worked on sites building warehouses, sat in an office doing quantity surveying and oversaw some structural designs.
"It was rewarding being involved in a real job and seeing the practical results rather than being at university studying from books."
Boric also seized the chance to take a rare winter holiday, something the New Zealand rugby season usually makes impossible. The highlight was Croatia, the home from which his family emigrated before setting up their 85-acre orchard at Kumeu in 1942.
"I have family in a small town halfway between Split and Dubrovnik and on the island of Hvar [in the Adriatic Sea]. It was nice to visit my relatives, they turn it on - I was definitely well fed. Hvar was probably my favourite spot. I did a cruise for a week with a few mates. Being out in the islands jumping off a boat and swimming for hours was so peaceful.
"With rugby, you travel a lot but you've always got a schedule to keep. Over there, I could chill out for a while."