Nope, can't swap...they have that groove for the setscrew in 'em, can't be turned around. If I swap sides then the open end of the metal housing faces away from the direction of wheel travel, encouraging the pad to slide out of the housing.
no good the solder, tried about 8 times. The solder melts but doesn't adhere, even after aggressive sanding and cleaning, coating in flux, etc... I dunno, maybe the bike mech gods are frowning on me.