It's easy to arc brake linings to the radius of the drum. Glue a strip of coarse sandpaper (40 grit) to the inside of the drum with water soluble glue like Elmer's, and scuff the shoes vigorously against it until the radius matches the drum. Then use boiling water to remove the sandpaper. Instant radius matching for full lining contact!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!