I tried the one to push-pull while the backplate was only started and away from the surface. This works sometimes if your close enough. I've had some surfaces that are very hard balsa and many times that won't work or a wire just won't make it's way through the hard balsa and a drill of some kind is needed. I can stick a t-pin through but it really doesn't work as a guide for any drill since the drill finds it's own way.

Lately I've been using the single hole control horn's by dubro which take the guesswork out of it all. One screw so you can't miss and much faster. Guess the Dubro's could be the ultimate easy solution.