I was having trouble with the upgrade path one-click. On the first time, I had bootloops when rebooting at the beginning of step 3. I R3L3AS3DROOT back to 886, then tried the one click again and had trouble rooting in 893.
So I just R3L3ASEDROOT again to 886, rooted and 4ever rooted (Step 1).
Then, I started up the bootloader/stock recovery and applied the 893 update zip from that path saver created.
Booted up, ran 4ever root again (via R3L3ASEDROOT, step 3, though I'm not sure if I had to, it didn't have any errors though).
Then I started up bootloader/stock recovery and applied the 901 update zip that path saver created. Booted up, in 901 and rooted.
EDIT: Loaded up Eclipse 2.1 RC with no problems (on 901). Tried 2.0 w/ 901 support before that but it was showing 5.7.983...