If you look at the end-on view of the torsion springs they're square. The divot for the set screw is in one side of the square (forget for a minute that we're talking several leaves, okay?) If you back out the set screws entirely, the springs are free to rotate in the beam, so it sounds like he let them rotate around a quarter turn or so until the set screw tightened down past the corner of the "square", although that seems like quite a bit of drop! My F Vee has a similar setup, but the bumper horns had to be cut off to make it work! At any rate there shouldn't be a problem if you raise the car and loosen the screws to allow it to drop back into place. Again, looking at the end-on view you see the "stack" of torsion springs. The divots for the grub screws are on the "side" of the "stack", so you want that lining up with the set screws. I don't envy you doing this on a sedan with a body! I'm used to everything just hanging out in the breeze.
