Well for one thing do not use the hinges that come with the plane. Use some good plastic pinned hinges. I used the DuBro pinned hinges for 40 size planes. I used a thin metal nail file, the kind with the pointed end, to expand the hinge spacing. Those fabric hinges are a pain in the ass to use. Especially if you need to replace one at the field. The plastic ones are MUCH easier to work with.

If you are going to use the stock hinges, then just use your hobby knife and deepen the hole until you get them to fit, it's ok if you make your cuts a little deeper. Make sure you dry fit your control surfaces before you commit them with CA.