How to transplant from 3" net pots in veg, to 10" pots to bloom?

Hey, new grower looking for advice on how to transplant my 3" net pots in bubblers during veg cycle, to bigger pots for bloom? Do i just plant the 3" net pot inside of the bigger pots with some additional hydroton, or try to take out the little plants from the smaller pots, and risk ripping some of the roots?

lol next time just start in what you want in the end, um really as long as the roots can get oxygen, nutes, and water ur golden , so dont beatup ur babies, try to put it inside the other one if the roots arent too big you know, dont be stringing roots through those little holes all day , theyl find water , but if ur anything like me lol ...... i hope you dont have a fuckin rootball goin , check mine out in my sig lol its you in 8-10 weeks best of luck man il stick around see what happens buddy

I know this is an old post but i wanted to give my method if anyone searches in the future.

I recently had a all my plants in 3.75 net pots and wanted to transplant them in my ebb and flow system.

All you have to do is cut the net pots with a pair of scissors.... just keep chopping till the roots are free. Only downside is you waste a 50cent pot. IMO small price to pay to keep plants alive.