[lutach]

For a Muggy, I would go with a 1521/1Y. It will be very happy on 6S or 5S lipos. I'm running 5S 9200mAh now and I can also run 10S 4600mAh when I feel the need for breaking parts, bending shaft and ballistic speeds. If and when Castle decides to make a Monster Max that can handle 12S lipos, you can easily run 12S 3700mAh 20-25C packs with the appropriate Kv motor for over 30 minutes.