I have the Wing kit and the wingspan you mentioned is 61" but the length according to the plan is 46.5". Using the Kokofan three view provided the fuselage should be 47.2". So that is close to being correct according to the three view. I think you measured from the front of the cowling instead of to the front of the prop dome. Almost all full scale manufacturers measure from the prop dome not the fuselage itself. According to the figures the fuselage is 98.5% of what it should be .

Hal