adding strut extension spacers shouldn't change the camber.
spacing the strut mounts, or flipping them, probably does change the camber.
please note that i am not an alignment guy.
just makes sense to me that flipping or spacing the mounts changes the point of attachment, whereas adding length(extending) the strut shaft only compresses the strut, leaving the alignment unchanged.
mabe.
see if anybody else bites.
richard