Help finding correct 13-7/8 awning operator track,truth

A quick learner says:
December 2, 2017
It was great that you could provide the Ellipse single arm operator parts 39-028E and 39-0227E
I ordered one of each to try and they are good for my windows. However the round when at end of arm does not
fit into existing track, too thick.
I looked for track and thought I found it, item# 39-512. I ordered two wheel still didn't fit.

Can you identify the correct track, is there a right and left right track.

Thank you for your assistance
Operator
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Tom from SWISCO responded:
December 5, 2017
I'm sorry to hear you're having issues. Can you show me a picture of the bearing at the end of your old operator? That will help us determine what you need.
A quick learner says:
December 6, 2017
The bearing on the old operator is much thinner.

Thanks for your continued support, hope it can be resolved so I can install new
Awning parts
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Tom from SWISCO responded:
December 8, 2017
Thank you! That's a big help. I believe our 39-366 and 39-365 are better options for you. I don't believe there is a track that can fit on your window in that same way that will accommodate the 39-028E and 39-027E. Fortunately, as long as they are undamaged, you can return them for a refund. You can see more information here.
Ellipse Style Single Arm Operator, 9-1/2"
Ellipse Style Single Arm Operator, 9-1/2"
39-028E
$20.70
Ellipse Style Single Arm Operator, 9-1/2"
Ellipse Style Single Arm Operator, 9-1/2"
39-027E
$20.70
SS 13-7/8" Awning Operator Track, Truth
SS 13-7/8" Awning Operator Track, Truth
39-512
$7.70
9-1/2" Single Arm Operator, SS Roller
9-1/2" Single Arm Operator, SS Roller
39-366
$30.99
9-1/2" Single Arm Operator, SS Roller
9-1/2" Single Arm Operator, SS Roller
39-365
$30.99
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