Ailerons on both the top and bottom wing would be my only mod if I was to ever build another one. I built this kit to replace the plans built Krier Kraft I lost. At first I hated the plane with the old .60 engine I used but then I replaced it with an SK .91 the plane came alive!! With the .91 I didn't really need the extra ailerons but I like a more responsive Bipe. I sent my plans to someone here on RCU, it's then that I noticed the plans were builders plans with the parts shown in profile so you can scratch build them too using the templates shown. I just never cared for the plane that much though but I could have used the templates and had them enlarged to build it as a giant scale. That was the AM I always wanted but the kit was gone when I came up with the money.