good idea to tape some cardboard over the top to keep those from falling out or debris from falling in until you get this out and put the top plate back on. again well done to all concerned. nick: sort of helping us at, at the same time that he’s helping this, this great company. i was to do this last evening, but found i could not fly. for answers to frequently asked questions or to find out about legal and tax information click here. balance a robot's motor load across two batteries to extend robot run time and increase performance. 