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Moved my amps but not the batteries. I would be a little worried about having batteries in a pretty enclosed space (potential explosive gasses, etc) but don’t really know enough to be sure.
Plus, from a weight-balance perspective, you are putting the heavy batteries on the same side of the craft as the pilot (a spot you know is always occupied while underway). In the stock configuration, at least you have some offset for the pilot weight against the battery weight.
That said, I do think it is doable. I don't think gasses would be an issue--they are already in a closed compartment in the aft...