Jasmine from SWISCO responded:
March 13, 2023
Thanks for posting! Take a look at the 39-013 and the 39-014. These operators are a newer style with rounded corners on the bases. Check to see it the arm length and the nylon bearing at the end of the arm match up. I can't tell from the photo, but if your nylon bearing doesn't match up to the 39-013, you will need to replace your track with the 39-505. Take a look at the operator and all the related parts. I've included the dimensions below so that you can confirm if this is the correct fit for you. Dimensions for 39-014
Additional information for 39-014
Alternate view of 39-505
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