I would suggest the World Models P-51- 40 size. It is an arf and is a great flyer with a 70 to 90 size four stroke. They also fly great on OS 46 two strokes for a start. They are all wood and monokote construction. Easy to fix if you need to. They build fast and fly great. I have several that I race (highly modified) and love to fly them all. My 2 cents worth.