track for 39-001/002 winder

A quick learner from Australia says:
I am looking to purchase a total of 39-001 and 39-002 winders. What is the correct track to use. Peter
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Tom from SWISCO responded:
Thanks for posting! As you can see in the Related Item(s) section for the 39-001 & 39-002 operators, there are two tracks that you can use: the 39-504 and 39-512 . Please take a look at these tracks and note their dimensions. Which would be a better fit for your window?
Anatomy of a casement window
Anatomy of a casement window
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