BACK TO STOCK after using Revolutionary to downgrade to FroYo?

[Automaton]

HISTORY:
I had enough of all the bugs with the OTA Gingerbread update, so I set out to downgrade back to Froyo.

I rooted using Revolutionary, then used RUU_SuperSonic_S_Sprint_WWE_3.70.651.1_Radio_2.15. 00.11.19_NV_1.90_release_161482_signed.exe to take me back to a stock Sprint FroYo ROM. I assume this also un-rooted me, which is fine.

*However*, when I boot the phone while holding the down-volume button it still says HBOOT-16.6.1002, it still shows S-OFF, and it still says "Revolutionary" at the top.


QUESTION:
How can I revert to the correct older hboot version, remove S-OFF and remove all references to Revolutionary? I want the phone to look like a stock phone that never did the OTA update for Gingerbread.

I saw this thread:
You can now unroot revolutionary - Android Forums

but I'm not sure if that will give me the correct version of everything (hboot, etc.) that came with FroYo.