Paul from SWISCO responded:
March 6, 2015
Thanks for posting! The way I see to adjust the roller assembly is to first drill a hole at the center of the vertical slot on the door, screw on the bracket lightly so that the roller can move up or down to adjust the door. Then tighten the screw and install an additional screw in one of the extra holes to lock it in place. That said, I'm not sure if the 23-186 can work for you. It you want, you can take a few pictures of your existing hardware and we can try to find something that matches your specifications.
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