I sell futures options, mostly, run my own and some friends and family. Not much 300K or so. Is there any reason to get a CTA? I know if I were doing stocks and equity options getting a Series 7 would get me risk margin, as opposed to Reg D. But is there any advantage, with regard to margin, if doing futures options, which uses SPAN? Is there any other advantage? I'm not really looking to market myself, at least not yet. What about incorporating, mark-to-market, etc.?