If anyone here is planning to build an Akromaster and use a larger than .15 engine, here is a suggestion. If you modify the wing by NOT cutting off the extra LE and TE, adding some extra ribs, modifying the center section, and replacing the strip flaps, you can add a few extra square inches of area to the wing. Here's an old pic of the results. Bottom one is standard with Fox .15X, top is modified one with FP .10.