Wow, Crazy, this is well, crazy amazing!!!
I just found this thread and have a lot of reading to do, but from what I had time to read, I am thoroughly impressed. Your mechanical plans and inclination is way beyond me at this point, but WOW!!!
A thought on your angel, couldn't find what kind it was other than mixed with gold on it (maybe) but I do find my gold marble angels to be more aggressive than other types and also more aggressive as younger (under a year and a half) than adults. I do, however, keep this strain of breeding adult angelfish in with phantom tetras with no problems than the occasions ventral fin nip amongst themselves.
I am def. subscribed to follow growth by BML fixture. Very awesome.