Let me throw in my two cents here.. Do the beveled surface like pilot pete suggests, but use Hockeytape or 3M Bookbinding tape. I picked up a roll of Hockey tape in Canada recently and this stuff is awesome for hinges; strong, but with a hint of stretch. It wont get a tear that "runs".

I just rebuilt my 10 year old Gentle Lady that a kid had landed his electric on top of, destroying the rudder. A decade of moves (5 to be exact) didnt help it either. I built a new fin and rudder, rigged up a more positive pushrod for the rudder, hinged it with hockey tape. I've flown it three times in the last two weeks and I love puttering around in light lift with it.