Custer is not the only person making dramatic résumé shifts. Michael Cox of Star Concepts is also fiddling with his profession. A cofounder with Stephan Pyles in Star Canyon, AquaKnox, and Taqueria Cañonita, Cox has severed his ties to Carlson Restaurants Worldwide and the restaurants he and Pyles sold to them a couple of years ago under the Star Concepts umbrella. "Initially, we thought it would be a five-year plan after we sold the company," Cox says. "They were comfortable with running the concepts, and I asked if we could end it early, and they said yeah. So they let me go off and do my own thing." What is that thing? Initially, Cox says it will be a lot of car pools and volleyball games, and perhaps some restaurant consulting if his phone rings. But in the long run, Cox is itching to open his own restaurant somewhere in Dallas after he completes the arduous process of securing investors and finding space. "I've got a lot of ideas in my head, but nothing I really want to talk about yet," he says. "But it'll be close to what I've done before. Probably something that'll be a little bit more unplugged from celebrity restaurants."...Cox isn't the only Star Concepts shift. Alena Pyles, executive chef of the Taqueria Cañonita that opened in Plano at the end of August, has departed the restaurant after just a few weeks. Carlson did not return calls for comment. Alena Pyles, who is the sister of Star Canyon-AquaKnox-Taqueria Cañonita founder Stephan Pyles, opened the Taqueria Cañonita in Las Vegas...Former PoPoLos chef Abraham Castillo has slipped into the executive chef position at Avanti Euro Bistro in Addison Circle. Castillo replaces French chef Gil Ferme, who sources say held the position for just a few weeks.