Depends on the quality of the casting.
it may or many not be an issue.
depends on how the braking surface is moving.
Hi Nicklouse, thank you, they have minisport superfins as part of the casting. I bought them many years ago and i'm certain i wouldn't have knowingly bought some cheap knock off copies as i'd read about what poor quality the can be. In saying that while trying to adjust the drums I can feel that the shoes have a tight area and a looser area in one revolution of the wheel so the implication is they are not properly centred. by the way the car has only done about 1,000 miles so they should be OK
Ahhh you have bought cheap knock off versions.
unless you mean you bought some SuperfFns from MiniSport?
very few things that can cause the edge to move. Poor casting but has no bearing on anything if the brake surface runs true.
miss fitted drums. IE. parts between the mating surfaces. But should not give that much movement.
poor bearings causing the hub to rotate poorly.
my old genuine SuperFines do not have as much movement as you describe. But do feel to bind slightly but I think that is more to do with the pads working correctly and pulling onto the braking surface as it is not the same point.