Andrew, Erh, OK, thanks.
I'm going to run Nano's, paired 3S3000 25-50C, Castle 80 with heat sink. Low timing.
BEC disconnected, and heat sink sits slightly down into the intake for cooling.
We'll see what happens.
Funny for the day. Ran up the set up on 4S today to check thrust (nearly 1:1 in the X airframe) Held it a little too close while doing so.
WHOOMP! Sucked my Tee shirt into one of the intakes!
Thank goodness for long intakes, no damage done. Other then nearly wetting myself.