Alert- The Criteriums are a complete different animal vs. Racers. DO not twist or attempt to toe-in the Criterium. Doing such will distort the pivot portion / drillings of the stamped plate type arms. Even if you've done it, you'll never get them back to the original factory shape for the next time or adjustment.

FBinNY has the right idea.

But if one wishes to get a quick pad to rim seating, use a flat block w/low grit sand paper and work the pad to desired fit.

Another example -For old time cars with drum brakes and fitting new brake shoes, we call it 'arcing'. With the drum nearby, we take the brake shoe -squared up, laid on its side of the disc sander plate, the shoe pad material is worked against the rotating sander. Very little of the material is shaved with the method of a trial and hand-fit matching the brake drum surface. Remarkable the difference in how well they perform vs. just installing out of the box.