I am flying an Aero 28cc Gas in my Seagull 1/4 scale Space Walker with Jtech style wrap-around muffler. Didn't need any nose weight. She will do any manuver I put Her thru. Even hang on the Prop. The Aero 28cc is one heck of a motor and cheaper than the Zenoah 26cc. It hasa rear carb and weigh's less to.Didn't even have to cut the Cowl except the bottom for the exuast pipe's.Tony.