No, I never went to 901. The stuff here moves way to fast for me to keep up with. I saw alot of talk about 901, you need safe strap, forever root, etc...Frankly I dont even remember how I rooted in the first place. I followed a link here, followed the instructions and voila is was done.
I went from this rom to 902 like this:
1) using rsdlite flashed 5.5.893
2) used R3l3as3d option 1 (restore,root,forever root)
3) settings-phone- check for updates gave me first OTA. Installed ota
4) settings-phone-check for updates gave me 902 update.
All good and still have Root. Took a good hour and all I did was follow the instructions