I notice that there is a not a lot tutorials on how to do a downgrade with a E3 flasher and there none of the latest files. So i decided to share my dropbox folder with u guys and leave some videos and other helpful guides.

Downgradable PS3 Chart
Spoiler:
NOTE There is more than one way to check if your ps3 if downgradable.
How to find your model number
FAQs
Spoiler:
My Tools
E3 Flasher
Plastic Clamp
Arctic Silver
Compress Air
Torx Screwdriver
E3 Flasher Errors
Code:
0 1 0 0 0 0 0 0 Failed to initialize TF card SD card not seated properly
0 1 0 0 0 1 0 0 Failed to read files in TF card SD card not seated properly
0 1 0 0 1 0 0 0 Failed to open TF card SD card not seated properly
0 1 0 0 1 1 0 0 Failed to write files to TF card SD card not seated properly
1 0 0 0 0 1 0 0 Failed to initialize NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 0 1 Failed to read NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 1 0 Failed to erase NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 1 1 Failed to write NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 1 1 0 0 Failed to initialize PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 0 1 Failed to read PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 1 0 Failed to erase PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 1 1 Failed to write PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 1 0 0 0 0 0 0 Wrong settings of switches Check toggle switch - wrong setting
1 1 0 0 0 0 1 0 PS3 is operating NOR, E3 Flasher cannot operate at the same time Check toggle switch -wrong sitting
1 1 0 0 0 1 0 0 Not the right PS3 for this backup Already used e3flasher on 1 console
1 1 0 0 1 0 0 0 Wrong PS3 version, not supported at present Metldr.2 model undowngradable
1 1 0 0 1 1 0 0 Wrong function settings Check toggle switch - wrong setting
Video Tutorials
Part 1
Part 2
Part 3
These Videos are in my dropbox so u can either stream them are download them
The Flash Tool Is 4.50 But Works With 4.75 (TESTED)
The Nor Inspector Is To Check If Your Dump Is 100% Good To Go
4.50 Flash Tool = https://mega.co.nz/#!tswA0T7R!p9by2a...hDRP7zrzgDh0og
NOR Inspector = https://mega.co.nz/#!UgwDVTRa!Aol0VH...jZZ8yWE2qG0Znc
E3 Flasher Update (MultiConsoles) = https://mega.co.nz/#!JlZQAAzY!pcgU8K...gy7xDJMGcFY66k
Hope this helps you guys out
RealCFW

Downgradable PS3 Chart
Spoiler:
NOTE There is more than one way to check if your ps3 if downgradable.



How to find your model number

FAQs
Spoiler:
- Are NAND downgradable? Yes
- Can i use a E3 flasher to downgrade a NAND? No
- Is it possible to jailbreak my ps3 without a e3 flasher? only if its already on 3.55 or lower FW
My Tools
E3 Flasher
Plastic Clamp
Arctic Silver
Compress Air
Torx Screwdriver
E3 Flasher Errors
Code:
0 1 0 0 0 0 0 0 Failed to initialize TF card SD card not seated properly
0 1 0 0 0 1 0 0 Failed to read files in TF card SD card not seated properly
0 1 0 0 1 0 0 0 Failed to open TF card SD card not seated properly
0 1 0 0 1 1 0 0 Failed to write files to TF card SD card not seated properly
1 0 0 0 0 1 0 0 Failed to initialize NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 0 1 Failed to read NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 1 0 Failed to erase NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 0 1 1 1 Failed to write NOR in E3 Check pads / clip at E3 board check may not be properly seated
1 0 0 0 1 1 0 0 Failed to initialize PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 0 1 Failed to read PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 1 0 Failed to erase PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 0 0 0 1 1 1 1 Failed to write PS3 BIOS Check pads / clip at PS3 board check may not be properly seated
1 1 0 0 0 0 0 0 Wrong settings of switches Check toggle switch - wrong setting
1 1 0 0 0 0 1 0 PS3 is operating NOR, E3 Flasher cannot operate at the same time Check toggle switch -wrong sitting
1 1 0 0 0 1 0 0 Not the right PS3 for this backup Already used e3flasher on 1 console
1 1 0 0 1 0 0 0 Wrong PS3 version, not supported at present Metldr.2 model undowngradable
1 1 0 0 1 1 0 0 Wrong function settings Check toggle switch - wrong setting
Video Tutorials
Part 1
Part 2
Part 3
These Videos are in my dropbox so u can either stream them are download them
The Flash Tool Is 4.50 But Works With 4.75 (TESTED)
The Nor Inspector Is To Check If Your Dump Is 100% Good To Go
4.50 Flash Tool = https://mega.co.nz/#!tswA0T7R!p9by2a...hDRP7zrzgDh0og
NOR Inspector = https://mega.co.nz/#!UgwDVTRa!Aol0VH...jZZ8yWE2qG0Znc
E3 Flasher Update (MultiConsoles) = https://mega.co.nz/#!JlZQAAzY!pcgU8K...gy7xDJMGcFY66k
Hope this helps you guys out
RealCFW