Be warned; every time you mention catgirls into a discussion on applied theology, a physicist writes some Permutation City self-insertion fanfic.
And every time a physicist plays God, we get one step closer to making catgirls reality.
Alternatively, every time someone calls the Singularity "The Rapture of the Nerds", some catgirls get physical with each other.
You're implying that the functioning of biological systems is highly sensitive to maintaining the "right" concentration of several active compounds. This is generally not correct. Quite to the contrary, "Robustness is one of the fundamental characteristics of biological systems." (Hiroaki Kitano, Molecular Systems Biology, 3:137, 2007; a good review article that contains multiple pointers to relevant publications.)
Note that this finding is quite in line with your point that functional modification of human brains is highly nontrivial - ...
CatAI (1998): "Precautions"/"The Prime Directive of AI"/"Inconsistency problem".
My memory may fail me, and the relevant archives don't go back that far, but I recall Ben (and/or possibly other people) suggesting you going to college, or at least enroll for a grad program in AI, on the Extropy chat list around 1999/2000. I think these suggestions were related to, but not solely based on, your financial situation at that time (which ultimately led to the creation of the SIAI, so maybe we should be glad it turned out the way it did, even if, in my opinion, following the advice would have been beneficial to you and your work.)
Awww... I was so looking forward to a heartwarming description of a family feast some years later where Akon delivers a toast to the SHs for "finally restoring the natural order of things."
HAPPY ENDING.
Upon due reflection, I have edited the story somewhat to include the final line, in accordance with your suggestion.