Well, I used Odin and cwm and taught myself how to upgrade to kitkat withCM11 nightlies, great stuff, fixed the issues I was having.
Then my tv dongle arrived, the one feature I wanted to use more than anything was screen mirror/AirPlay. No you can imagine my dismay when I couldn't even find the option in cm11, I found cast screen but it wouldn't work.
So, having tried several nightlies hoping the problem would be fixed I settled on reinstalling the stock 4.2.2 rom following the instructions on here. It bricked my tab 2 but I managed to get it going again and reinstalled the stock rom after several days of trying.
All this to find the screen mirror option was not available on the stock rom!! I can't figure out why but thought, maybe, an upgrade was needed, so I headed to the update tab to be told that my device was modified, updates are not available!
To be honest I'm ready to throw it in the lake behind my house I'm that frustrated, does anyone have any suggestions on getting screen mirroring working?