Rooting your Stock 5.0.2 rom for 10.5

Used for T800XXU1BOCC_T800XAR1BOC5 the file is about 1.6 gb so plan ahead. Below are full link you can use to download the stock rom.
If your on 4.4 and already rooted this will maintain your data and root.
download here
Must be on 5.0.2 past this point
1. Put your Tablet in download mode  Power, lower volume and home.
2. Extract zip and run Odin3 v3.10.0.
3. Click off Auto reboot
4. in AP add the twrp-2.8.6.0-chagallwifi.tar
5. make sure your tablet is added. then hit start.
6. Once passed you need to manually shut tablet off by holding, power, both volume and home button.
7. Start TWRP by holding power, volume up and home button.
8. Now you need to flash super user downloaded from http://download.chainfire.eu/supersu download newest superuser Zip
9 restart then update via play store.

Stock downloads
http://samsung-updates.com/details/42620/Galaxy_Tab_S_10.5_WiFi/SM-T800/XEF/T800XXU1BOCC.html
http://rapidgator.net/file/93d13bae5553fd88ae23c07445dc70c8
Or you can pay 8 bucks to download fast from sammobile