I met a fellow yesterday that had some interesting squid flies in his box. I asked him to go to this site and chaeck it out.
His flies were the usual body types but he had an interesting tailfin setup that seemed to me would work fine. the tailfins were nothing more than duct tape folded over on itself and trimmed to imitate the fins. He described the flies action as sporadically erratic as it was retreived. I know I would try it !