Thanks Sully for the well-informed response! I sent an email to the original owner who said he can't for the life of him remember what is in it...I'm going to assume it's the normal stock setup which I believe are 30A ESCs (according to BH's specs) which they call for a 14.8V 4S 2200mAh 25C...Sheesh, talk about a flying brick!
I'll try a 3S first to be safe and check what the wattmeter reads. I don't care about these stock electronics, if they fry, they fry, but I don't want to destroy yet another airframe in the process.
I've had may share of doing that.