Interesting finding with regarding rooting with Motofail_windows...
I have a Bionic and a Razr Maxx. I was able to re-root the Bionic thanks to help offered by Sargentmajord. Once rooted on the Bionic, I got brave and decided to root the Razr Maxx.
The download file for the Bionic was Motofail_windows. When I went to the Razr forum, I found Motofail_windows(1) was the rooting software for the Razr. The Motofail_windows was 1,799 bytes and the Motofail_windows(1) was 1,800 (compressed I'm sure...).
The process was the same but I failed to notice who created these exploits. My guess is they are the same.
By the way, the exploit for the Razr was created in response to an OTA taken by Razr handsets just as there were OTA's taken by Bionic handsets that rendered the previous roots no longer viable. Another funny thing I noticed was that both the Bionic and Razr owners made observations that some of their rooted apps continued to work on handsets that lost root due to OTA's (specifically, the SqLite tether permissions hack). My experience was that my Bionic was unable to use Titanium Backup but other rooted apps worked.
So, here is my question / observation: Could I have used the exploit first created for the Bionic to root the Razr (after all, it seems the Razr is the Bionic 2 but with a 1.2 Ghz processor rather then the 1.0 that comes on the Bionic).