Rooted OC5 to OK2?

I had been running CM 12 and 13 for a long time but have recently been having problems with my GPS. It works in stock rooted OC5 but OC5 has stagefright vulnerabilities. From what I understand that has all been fixed with OK2. I was just wondering if anyone knew how I'd be able to go from OC5 to OK2 and keep root.

In the mean time I'm gonna try flashing CM13 again and see if GPS works for me now that I got a lock on stock...

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