I was reading the interview with Tony Saliba in Schwager's __Market Wizards__ about how Saliba would "string together" butterflies to create a broad profit zone. I can manage to produce nice, broad profit zones with calendar spreads (at the cost of excessively long vega exposure), but trying to string together butterflies seems to be impossible. There's always that deep risk zone between the the profit zones. Is it indeed possible to create a seamless profit zone with flies, comparable to that of a multi-calendar spread position, and if so, could we get a little discussion going about it? Thanks for your feedback, folks.