I know you were mentioning a .60 sized plane but if you really want to build a warbird that builds as easy as a 4* and flys just as good, Herr Engineering makes a cool 1/2A Mustang kit ( in know it's tiny...). I powered mine with a Norvel .074. Running on 25% fuel, it is a blast to fly. Here's a picture of my latest 4* also to give you an idea of the modification possibilities.