I recently acquired a fat CECHA01 running 4.21 with a manufacture date of Nov 2006. I looked up what the best steps for getting it downgraded and I am feeling a little confused. I tried searching around the forum but I didn't find anything about 4.21 unless it was referring to a CFW. I do know that it is a NAND machine based off of this and that I have to use a hardware flasher to get to 3.55 so I can get to a CFW. I can't use the e3 flasher without doing the soldering by hand but I know I don't have the time/skill to do that. Are there any solderless options for me out there or should I just give up?