Just read the guide again on page 1 a few times. A few questions and clarifications as follow:
I am on OFW 4.00. I probably want to go the Rogero 4.30 2.05 (I believe this is the latest CFW). If I am reading the guide correctly I do not need a dongle. Why would you pick method 2 or 3? Are method 2 and 3 only if you are going lower than CFW 4.30? Why would you want to go lower than CFW 4.30?
Is mehod 1 riskier than the method 2 or 3?
Also is it preferred to cut the metal as shown in E3 Wiki guide here on Pic 3 and 4: