Wow wow!! What do you say here? That you're able to fastboot only on the safe side? I thought fastbooting would destroy the SS partition. Maybe I didn't get correct what you said.
No, when you RSD, it wipes everything and starts you over completely fresh on 211. No SS stuff. You can put SS back on and use your backups to restore, but it will wipe SS off.
Everything but your SD card (ext/int)