Two months ago I converted my PS3 (FAT, NAND, bought in 2007) to DEX. I did not enable QA Flag before converting to DEX. I am now on a 3.55 DEX MFW I created using MFW Builder. As 4.XX CFW were released, I now want to go back to CEX. I have looked up tutorials about this but some say that using LV2diag.elf and a dongle is required while some other say that we can just flash the original flash in multiman and install a CEX pup. I am a bit confused now and would appreciate any help! And I don't have a hardware flasher but I do have a TI-84 I could use a dongle.