Casement arm roller too thick to fit inside glide track

A contractor from Sewell NJ says:
45251 truth casement operator LH
The size of the roller is same diameter but not the thickness which is 3/16 versus 5/16
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Bob from SWISCO responded:

Thanks for posting. See our 39-366 . This operator has that raised roller at the end of the straight arm, similar to your own. Look it over and see if you think this might be a better match for you. 

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