E3 direct downgrade with Rogero 4.30

Hello, I have a question about a direct dowgrading with E3 Flasher, I have successfully dowgraded about 10 PS3 with this method:

-Install E3
-Upgrade E3
-Backup Nor
-Check Nor Dump
-Flash e3_downgade.bin
-Remove E3
-Install CFW Rogero 3.55 (In FSM)
-Upgrade CFW to Rogero 4.30 2.05

The question is this, I have readed that I can flash directly the Rogero CFW 4.30 (instead of the CFW 3.55) but i wanted to ask if it's possible (I don't want to brick the console).

Thank you very much!