Can't help, I'm afraid, Tony. I don't own one. But the CMP is a little larger than 1/5 scale, I think. The full-size Cub has a 36-foot span which works out to 432". Divide that by 5 and you come up with ~ 86". If I remember correctly, the CMP Cub is 91". So 1/5 scale is somewhere between the H9 80" J3 and the 91" CMP.