I need to know the differences between your 50" wingspan J3 Cubs. Nitroplanes.com sells 4 different versions, yet seem to have the same photos for each version. What gives? I tried contacting your company via email and phone and no reply. I've read about your non-existant customer service and it appears the forums do not lie. I guess my last hope is posting a reply to this forum. Maybe winning the lottery is better than getting customer service from Nitroplanes.com?