Hello,
Aren't someone supposed to be kicking my butt?
I don't know for that, but I'll do the scorchin'.
Aside from a few grammar mistakes, you actually forgot to judge one category of lesser priority (and no, it ain't the presentations, which you seem to have covered, though I don't know by what degree). Even if it could've affected a maximum of 0.5 points towards either direction (+/-), it's crucial in neck n' necks.
So hmm... Oh yes, so you chose Black as a winner because his idea was doable, however, you could've gone with the averages as well...