After the downgrade via Odin. ..
Pull battery. .then power the phone into download mode again. .and run CF auto root. ..
The device will boot itself. ..
Use the UCAMA4 rooted rom from Mr. Robinsons thread. .for your downgrade. ..
Don't worry when the Odin flash fails on the bootloader portion. ..just unplug the phone and pull the battery for the CF step. ..
After boot and rom verification. ..power down and enter DL mode again to flash your custom recovery. ..
The bootloader doesn't play nice with the process. ..but it works. ..g
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app
" There are Givers, and there are Takers. Be a Giver, and these things will come back to you. "............
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Without them, we'd be writing on rocks with a stick...g