Hi, not sure if anyone noticed, but I've been out at a training academy for the past 4.5 months, but now back in the mix of things. My planes have been sitting for that time. Before I left, I gave them a good cleaning(engine) charged up the rx batteries and disconnected them from their switches. Is there anything special I should do to the engines or batteries before taking back up to the friendly skies. Geezzzzzz, haven't flown in a while, hope I didn't forget how to go vertical and inverted?