Don't waste your time to ask FEJ.They will never answer your question.I have a problem with missing parts and the setting.I've asked them for many times but no any answers.
I have checked with my Chinese friend and she said it has gone bankrupt.
The Sky aviations is the Chinese company that copy molds from FEJ.They have the main company that is Soringjet (http://veatcn.com/ ).Because of landing gear problems and bad customer services,they cannot sell their products with under Soring brand anymore.
For Sky aviations,which model that you cannot see a landing gear that means no landing gear set for that model.Of course,no any manuals or instructions for any models.