Since I had the Dremel out to MOD my Mamba Monster, I decided to MOD my MBX5T to see if I could fit the Neu 1515/2Y finned without trying to grind the heat sink further. I had to cut the chassis just beneath where the motor goes, grind down the bearing support and that was it. I used a nice little mask to protect me from carbon fiber dust, but forgot to use a long sleeve shirt and now my arms itch like crazy. Well it worked out good. I love the Dremel. I changed my gearing from a 15/48 to a 17/48 to get some more top speed. So I went up from 35mph to 40mph. I hope temps stays down. I'm going to do a test run tomorrow to see how it goes. I'm also going to take my 1515/1.5Y and my first version ESC too incase I need a back up.