Well, I do have the dremel, so I can try that (and I have lots of practice with that with other hobbies), but I'll just try the hobby knife first. I also have the dubro hinging tool, but a guy at the club suggested I use CA hinges instead of those hinges with the pins in them. And boy was he right, I installed the hinges for the aileron on the other wing half on the first try and it was actually pretty easy! CA hinges are so much thinner that it makes quite a difference.