Paul from SWISCO responded:
March 8, 2018
Your top roller assembly looks like our 23-046, except ours comes with an adjusting screw where yours is spring loaded. Our 23-086 comes with a concave nylon ball bearing wheel, but the mounting screws are in alignment instead of off-set like yours. If you use this, you will need to drill new mounting screw holes. The 23-086 roller assembly does go with the 23-272 bottom track.
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