I too have been using the Radio South CA hindges for over 15 years. I just use an exacto knife and cut a slot. Be careful not to bleed in too much thin CA as it can run down the aileron bevel gap and stain a new monokote job. The next step is to seal the air gap from to bottom side using monokote. Not only does sealing the air gap make the plane respond better, it eliminates much of a flutter potential that can cause any hindge to fail. I have only had CA hinges work loose on planes where I could not seal the air gap. This is mainly on the rudder when the vertical fin is painted.