Hello! I just had a couple of questions about potentially starting with FPV. After looking at some video systems, I was wondering if I need a radio license to use them or if there are some exceptions. In case I do need one, for some of the bnf or rtf quads, would it be possible to use them without powering up the vtx until I have time to take a class for the license? On the other hand, I was thinking about maybe building a gremlin without any video system for the time being, and I was wondering what kind of setup or programming would be involved with the flight controller.