corner brackets are loose

A quick learner from Canada says:
I recently ordered a set of replacement corner brackets and wheels (95-227) for my patio screen door. Are the brackets supposed to be loose? I can easily insert and remove them by hand, and the joints are not tight. Just wondering if I need to wedge something in there to tighten them up, or whether that is normal.
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Dave Sr. from SWISCO responded:
I'm wondering if you ordered the wrong corners keys. For a quick fix instead of shims use some masking or duct tape to make the corner key thicker. Maybe that will do the trick.
A quick learner from Canada says:
They are the same size as the originals, and the originals were somewhat loose too. I put a two screws into each corner bracket, one from each outside edge, and the frame is now tight and rolls very smoothly.
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