I'm fairly new to the MXT Pro but I was wondering if the D2 coil was needed/recommended. The coils I currently have are a 6x10DD and the stock 12" coil that came with it. I will be getting a 5.3 when money allows after reading all the talk about it. Just a bit unsure on the differences between the coils I have and the D2 coil. Any information would be greatly appreciated.