I suggest using the P3 GT Break for its ease of use and supports any payload and it will use both payloads hermes and pl3 as it supports dual payloads. It also comes with a switch for he slim making the whole process less archaic. The teams website is gamebox.hk and can be purchased from ***********.com for under$ 25 shipped.
PS3 CECH-2501A [CFW] & CECH-3001 [OFW]/ PS2 SCPH-3901 & SCPH-7501/ PS1 SCPH-5501
Mod Cobra 4.46 v7.00 w/ E3 Flasher [CFW] & Cobra ODE 4.50 [OFW]/ Mod HDD-OSD [Phat] & Modbo 4.0 [Slim]/ Mod MM3
HDD 1tb [CFW] & 640gb [OFW]/ HDD 640gb & OPL v0.92 w/ 1.5tb SMB