dont count on the MM to run on 5s, I am not familar with the Medusa's, with 4s I would go with a Neu 1515/1y (2200KV) or a 1515/1.5d(2700KV), the 1y if you want a happier running system or if you want to race, the 1.5d if speed is more important to you...if you need to run the 5or 6s I would go with the MMM, if it was me I would just go with the MMM and do what ever you want.....and with 5s I would go with the 2d and 6s the 2.5d