No problem Charge. There is huge amount of experiments listed in the Naudin's site; some by hobbyist, some by large companies.
BTW, the Lithium-polymer (Li-po) batteries are closing performance level where internally powered lifter might be soon possible. J. Naudin's "Maximus II" lifts 60 g playload with 390 W and as an example new generation of Li-pos weighing 60 g (3x800mAh lipos in series with voltage 12,6) do about 20C dis-charge rate (20 times capacity) ie given playload can produce now around 200-250 W assuming that a very light voltage-voltage converter can be made. So within couple years there might be radio controlled lifters.
gripen