[magman]

If you are planning on using a mm esc on 4s you need to disable the internal bec and get a external one. I run my mbx-5 on 4s w/a mm esc and a ccbec w/ no probs. I also have GriffinRu's mod 1 done to the esc whiich helps w/temps and for the larger cell batts. People have run the 8xl and seemed to have temp. issues on 4s. You might want to consider a Medusa motor...they seem to run cooler and are more reliable. Try the 2000kv motor and you can't beat the price!