I've used LIPOs in antweights before, and even in them they're vicious little things.. Would just be concerned about making that much power available to a home made speed controller, which are prone to shorting tracks. I'm gonna try it anyway, but still would make me a little nervous. My ESC has survived 12 fights fine so far now though, so i'm a little more confident in it than I was at least. Under voltage cut out for LIPOs is only an advisory rule; I'd like to have it, but depends how hard it is to add, and on what capacity lipo I get; as long as I charge it every fight it should be fine.
Also decided to fit external bearings to my drill motor shafts to take the weight of the robot; the gearboxes on them aren't really designed to take the sideways force of a feather dropping on them.. I almost lost both my motors today in that flip from the floor flipper!
EDIT: Those Lipos are cheaper than i'd expected! I might get away with just one of those; The drive doesn't take a whole lot of power to run the two drill motors, and the lifter isn't running half the time. Obviously would have to try and see how fast it got through one, and fit undervoltage protection in that case, but worth a shot; The moto of this build is the less money spent the better :L
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