Hacking modding a refurbished psp 3004

[naddel81]

hi @ all,

I just got a refurbished psp 3004 for 20 bucks and wanted to go this way:

1. install 6.60 (L)ME Installation on top of OFW 6.60 using https://psxtools.de/index.php/Thread/45241-Tutorial-CFW-6-6x-Installation-zu-allen-PSP-Versionen/
2. install 6.6.1 permanent PRO using http://wololo.net/2016/02/14/releas...nfinity-6-61-permanent-patch-for-me-pro-cfws/

questions I still have: where to get the OFW 6.60 and is my project brick proof?
any help is highly appreciated.
best wishes.