Are Zippy Lipos safe with a Castle MMM Speedy?

update-My Flux and the original ESC are still working just fine exclusively on Zippy packs. I have since moved to Hobby City's Flightmax series of packs as the Zippy H packs I was using have been phased out. Either way, I still run the old packs and have had no problems to note other than a wire coming off of one of the Deans on the ESC side.

The basis of this argument of whether or not Zippy packs and ESC failure go hand in hand holds no water per se as there's a whole lot of guys/gals running Zippy or Hobby City lipos in their MMM powered rides and they are not having issues. Consider this the RC version of Myth Busters. Busted. lol