(adsbygoogle = window.adsbygoogle || []).push({}); Yeeaaahh. I was just wondering,how big process it would be?
First i would have to install QA Flaq,then use Rogero downgrader.pup, then install 3.55 CFW, do some root key dumb or what ever,then go to 4.21 REX and switch to DEX/CEX everytime i want? : O

Yeah,i don't have much info about this,so good tutorials/info would be awesome, +rep for best answers,like always!

This was good tutorial: You must login or register to view this content. But there is no info about downgrading, how to switch between CEX/DEX and make the root key dumb thing.

I could keep using google,but i wanna make sure and ask from you guys,i don't wanna end up bricking my ps3.

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rootkey can dump only on 3.55..you can use eEID_RKDumper
make all time backup of important files like flash dump and rootkey..

Thanks! Solved almost all my problems. But yeah,after using downgrade and qa toggle, should i first install 3.55 ofw,then 3.55 cfw(if yes,wich?) ,do the rootkey dumb and move to 4.21 Rebug + switch then to dex?

you can install ofw or cfw 3.55 you want..i prefer kmeaw..