Hi all. I'm pretty new to all this equipment, and could use some pointers. I got two c-stands from my friend, a Manfrotto Avenger and a Mathews stand. Neither have arms or heads of any sort, just the mounting stud on top. What do I need to invest in to make these stands useful? Specifically, how would I set this up to mount a reflector at various angles? And since I'd prefer to build the reflector myself, how does a reflector usually attach to a stand? Grip terms aren't very clear to me from browsing B&H so far. Also, are these universal sizes? I don't see much mention of compatibility in the product descriptions. Thanks for any help.