The older brakes I would set them at .004 then take them to .002. After making adjustments, pick and drop the brake a few times to get it to sit on the drum properly. The screw I would back it out, put a drop of loctie on it, pick the brake, turn the screw in until the switch clicked then go another 1/8th of a turn in. The locking tabs are made so once the brake is adjusted they can be installed without turning the adjustment screws to get them to fit. Pull them off and turn them over or reorientate them to get the slot to line up for the anchor screw. The mx 32, 40 and 100 are different but those are not that common.
