Bifold track and necessary accessories

A handy person from Philadelphia, PA says:

I have bifold doors installed, but want to replace the track with the brown one (23-450).
I plan to re-use the bottom hardware.
For the top part of the door, I assume I should get new hardware from you.
Is my understanding correct, that along with the track 23-450 I'd need a top pivot guide (23-121), pivot bracket (23-312), and spring loaded top pivot (23-112)?

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Paul from SWISCO responded:

If you are just replacing the top track with the 23-450, you will need the 23-121 & the 23-115. If you want to change the bottom corner bracket, then see 23-312 & 23-151.

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