David I doubt such a small hole in front of canopy will be enough to cool down Batt & ESC they get really hot inside such a small area, i see a big hole underneath the fuse ( is that correct ? ) and assume pourpose is to let hot air come out.

IMHO there will not be enough fresh air coming into batt's and esc trough those ducts you mention, unless there are some more vent holes I dont see.

Talking about spinner , yellow one looks much better.

Anyway, congrats PICO is looking great and one step closer to maiden flight report.