[suicideneil]

That sounds fine really, and still perfectly useable, even if it doesnt have the same punch and top end as a lipo powered machine.

Castle doesnt recommend the biggest and baddeest batts to use with the MMM, they just say dont go buying crappy chinese batts or naff ebay items that cost $20 each, yet claim 40c like proper lipos in the ~$200 range can actually manage.

The 30C hobbycity lipos a re great budget lipo, or the Hyperion G3s for a good value top-end option; I run older 25-35c hobbycity lipos and no problems here, even with my old V1 MMM.

I see no advantage to running the external BEC or RX pack with the V3 MMM, very few internal BEC failures these days, seems to be more physical damage causing BEC failures (heavy landings and such)- given Castle's excellent customer service you wont be without a working esc for very long, maybe pickup a spare esc to run in the mean time if its important to have a working one for racing and such.