Just for fun, here's what the older .60 I have looks like. My father bought it around 75 or so and put it in a RCM/Bridi Trainer 60. His eyes went bad before he could ever fly it, but I took it up for him once. The engine seemed at the time to have good power, but I'm thinking getting a header for a tuned pipe might be difficult. It would complement the "patina" quite nicely though huh? Do you think retrofitting retracts would take away from that?