Shubova,
Like everyone else I came up with my own meaurments to get the proper throw on the ailerons, I also did not have any trouble with the tail wheel wire, except I had to straighen it out occasionally. The modification I made to this one was to mount the aileron servos on their side and place them in the wing. It always bothered me to see those servo's hanging down under the wings.
I use an OS 120 FS with out pump and here in Omaha, it seems to handle the plane verry well. I did find that changing from 15 to 3O Percent Nitro made a huge difference in the power I have available on take off.