Tried it twice. Same result. I'm pretty sure it just installs a rooted, deodexed, 2.3.15. As that's what my system version says. I had 2.3.9 flyx prior to touching rubix. My system version says 2.3.15.mb810.Verizon.en.Us exactly. Never took ota obviously and still have the flyx boot.
Edit: was rubix removed from RM? The creators name still appears but it says error loading the current Rom list when I select it. The other roms still show up.