Door reinforcement plates are normally needed, so have these plates made-up beforehand, using the dour mounts as
patterns. The reinforcement plates are normally 1/8 to 3/16 (3.1 to 4.1 mm) steel straps having mating holes drilled and
tapped for the cap screws used to fasten the mirror door mounts. On the front and rear of each reinforcing plate drill and
tap 2-each smaller screw holes to fasten the reinforcing plate onto the door permanently thus allowing removal of the
mirror door mount without loss of the reinforcing plate.