Get the front one to fit all the way down, flush with the notches of the hinge on the wing surface and by doing that it moves the hinge point back and the rear one should fit the same, just clean up the slots on the wing so they fit. The hawk and PC21 have the same setup and it works. Just keep the back of both front hinges the same distance from the rear of the wing. Have a look through the PC21 thread as well for confirmation of what I hope I described ok.

The Hinge covers are another story though, but with lots of patience the end result is worth it.