Hi!
Using CA hinges is easy. Just push half the hinge inside and drop on some thin CA (I use Flash). Then do the same with all the other hinges...when the glue has dried ...attach the rudder /elevator /aileron and observe how it fits...if everything looks OK drop on some CA onto all the hinges and hold still and push hard against the wing/stab/fin so the gap becomes more or less non existent. When everything has dried ...wick the control surface side to side /up and down to control that it is moving freely
Using a pin to hold hinge is not necessary and I don't recommend using one either.

Regards!
Jan K
Sweden