That is degrees C, I assume?

My first flights( this weekend) I hit 140ish degrees F on the motor (Hacker C50 13XL). I diverted half the air coming in towards the motor and it dropped temps about a good twenty degrees. Battery temps were 106F after a 7 minute flight (Flightpower 5350's) and the measurement off my controller heat sink (Masterspin 99) was around 110 plus. In my case, I have to ask, is the temperature of the controller acceptable or do I need to improve its cooling to? Ambient temps were around 75 to 80 degrees F.

I just did some trial and error cutting of cardboard and then used it as templates for the depron I used. Ain't pretty but it did the job. It just makes removing the motor a little more difficult.