Mamba Max on 5S in a truggy?

[The Dan]

I've been dying to breathe life into my rolling RC8T for weeks now, but I'm on a budget. I've got a venerable old MM ESC lying in wait for it's next assignment, complete with a fan and Castle BEC. It never let me down running 4S in my buggies, so I'm thinking about slapping a Feigao 10XL (~1700kv, 66A) behind it and running Zippy 5S packs. Have any of y'all played with running a MM on 5S before? In theory it should work without problems, having even less amperage to heat it up. Just wanting to ask the experts.