R/C models, FPV/UAV, DIY, how to & tips

My Radio Control models and FPV/UAV flight guidelines, DIY  "How to" tutorial and list of general public FAQ. Worth reading for those interested in building tip, flight ethic, some DIY works, fixes for R/C models and related.  I'm going to use a less jargon and simple word to talk about it for general public understanding. Will be slightly "chinglish" since english is not my native language.  The contents are based on my lifetime experience on R/C models, FPV/UAV/drone flight experience and hands on practical DIY works.