39-253R Maxim Dual Arm Operator needs additional part.

A quick learner from San Francisco, CA says:
I received the 39-253R Maxim Dual Arm Operator, Sill Mount(thank you), but the one I need has an additional piece on it. I've attached a picture that shows both the original, and the part you sent (39-253R). I've looked through the pics of your casement operators but can't find the one that is exactly like the original, which is from a Marvin window. Do you have the one I need?
User submitted a photo of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
Looks like you're talking about the track slider and bracket. You can probably pop your old ones off and put them on the new operator. If you can't, or if yours are broken, then see our 39-529 slider and 39-545 bracket.
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