The ones I built for myself were smaller and plans built. The only problem I had was getting the landing gear plane into trim. After doing a lot of study of the plane I found out that LG plane was one of the trim methods used on the full scale. My small ones were also very heavy and to my surprise they handled the wind very well. Mater of fact the wind helped a bunch on take off and landing. I have flown a lot of the WWI Bipes and the D-VII is the best handling of all of them, in any size.