Very good point to mention Mike.
Fortunately I forsaw the problem and how I solved it was to remove the hinge pins from both halves, countersunk the cut ends, and re-inserted the pins. Then I hammered (riveted) them into the countersink.
Alex, sit back and read as I make all my mistakes. Then you will be able to get it all right when you do yours. Good luck when you attempt it and keep us up to date with yours too