I have run my boat with this mod 8 or 9 time now and have yet to warm up the internal temp over 110F , outside on the heat sink has been about 90F by the time I get the hatch off and get the temperatures. The boat it?s in is a 36? Aeromarine that weighs 17 lbs with 16,000mah of 6s and I can run it full throttle for over 5 minutes with a TP5650 1150 kv motor pushing with a m545. The motors internal temps can get around 140F . Everything is good and my caps on the esc get around 115F. I will be doing this mod again