I took mine out the the track last night and ran the snot out of it. Put 3 5s 5000 packs through it with the 1515 2.5d motor geared 23/46 in my rc8 which is good for about 45 mph.

The fan broke within the first 2 minutes on the track. Same problem as before with the plug breaking off the bottom of the board. I even put extra foam padding in the bottom of the case. Ran all night with no fan and it only got up to about 160 degrees.

When I got home, I cut the grill out of the top of the ESC and put in a Novak 30mm fan powered off the receiver. Works perfectly now.