Hi George, from the beautiful city of Prague. Welcome!
As Fred said, here in Ireland we have a big Glide - In this weekend

so many pilots are busy getting their models ready, or travelling to the flight area. (Mt. Lienster in County Wexford.)
Regarding how to hinge the aileron, rudder, and elevator. There are many ways to hinge them. The way that Fred is saying is by cutting the bottom trailing edge of the aileron at 45 degrees as you can see in the next picture.

This will allow the aileron to move downward, as shown in the next picture.

The hinge itself is actually some very strong sticky tape that is stuck to the top of the aileron. Part is stuck to the top of the aileron and part is stuck to the top of the trailing edge of the wing. Look carefully and you will just see it in the next picture.


If you wanted to make a very strong hinge you could also use some more tape on the underside. So the aileron has tape on top and on the bottom as well.
Elevators can be hinged in the same way.
For the rudder……
Cut the trailing edge of the fin to a > shape. And the leading edge of the rudder to a < shape.
Place the rudder and fin close together > <and stick the tape on both sides. (They should be as close as possible so that they are touching >< )
You can clearly see the tape in the next pictures


There are many other ways to hinge controll surfaces George, but this is the easiest, cheapest and lightest way that I know of.
Oh, one more thing I must tell you George. By International Convention & Law you must show us some pictures of your finished model. (we like to see lots of pictures on this forum!

)
Keith