How to get back again from GEM-703 TO GEM-701

Hi all xda users
Now im in GEM-703L B112
Mediapad X2
Original rom was GEM-701L C185
Successfully experimented this topic
http://forum.xda-developers.com/medi...-702l-t3228915
Now i need to get back to original rom
Or convert to GEM-702L
Please tell me the safe way to return
Thanks all