Dave Sr. from SWISCO responded:
April 9, 2015
I pulled one of the 87-163 rollers from stock to check the axles. They do seem a little wider than the housing, but not by much. I would try and file down the axles just enough so that they can fit into the window frame. I wonder if these rollers are meant to be installed before the frame is put together. Some manufacturers have been known to do such a thing. Just a thought.
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Dave Sr. from SWISCO responded:
April 22, 2015
That's great to hear. Thanks for getting back to us!
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