Firstly it is backup and not bake up.
And why do you need to make the backup as a flashable zip. You're making things more complicated.
Just backup through CWM by going to backup and restore>backup to storage/sdcard1 or 0.
You can simply restore it by going to backup and restore>restore and select your restoration file.
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And on rr 5.0.3 using evolution kernel 1.5
Rom's are angels...
and the developer their master
Hit thanks if u find my post helpful
Galaxy grand duos running CosmicCm v1.0 by k2wl
Secondary Device: Asus Google Nexus 7 running paranoid android 4.2 beta