That is AWESOME!!! It sounds like you have REALLY really thought this through & are taking lots of precautions. The *only* suggestion I would make at this point - because it sounds like you have all of your bases covered very well - is to do all of your husbandry in your established collection before ever doing anything with the RTB that is in QT. I know that sometimes things come up that require a keeper to go back & forth, but if we all get into the habit of "established first, new animals last" in terms of routine, it can potentially cut down on cross-contamination issues. :D I'm sure you already know this (again, I'm sincerely impressed at how you have handled everything thus far), but it certainly doesn't hurt to repeat.
K~