those blade heat sinks are pretty wimpy IMHO...their surface area is minimal!

GWS makes 370 sized heat sinks that are a drop in fit for the blade main motor covering the whole motor just below the vent holes...very effective heat sink.

ditto for the tail motor. The GWS heat sink designed for that size motor covers the whole motor. after a flight I can barely feel the heat in the tail motor.

a drop in fit here also. I usually resolder the ground wire on the motor to another spot to allow the heat sink to be placed on the motor with the most surface contact

cheers
Papa Sharptooth

Bouncing about the living room, my then three year old grandson declared himself "a kangaroo".
"If you're a Kangaroo, what is Grampie", I ask.
His reply: "you a dinosaur"