I used to use the Slot Machine. It left bits inside the wing (I hinge after covering) and was a pain to align. Bill turned me onto Radio South hinges. Just a simple slot with an x-acto knife, slip it in. No need to get it bigger, and the hinges won't fray like the SIG and Great Planes hinges. I hinged my entire Burrito in less than 15 minutes, I'll never go back!!!