I think 1515 on 3s would be a great reliable set up with a good balance of weight on the chassis but I must say that the 1512 tossed my e-revo around like a rag doll on 4s but it was easy and smooth to real it in. The 1512 wont exceed 115 degrees no matter what I do. I'm very new to the brushless scene but I will have first hand knowledge of an E-slayer with MM, 3s and a lesser quality motor in a couple days. We will toss in the 1512 to campare.