What system do I need for crossbars on a Thule track system?

Hey all, I’m pretty confused by the different options here. I just purchased a Leer camper shell with the preinstalled Thule tracks. Tracks only though as I don’t really need crossbars right now, and these are usually pretty easily available used around here. But I’m just not grasping I guess exactly what all I need? Looking at Thule’s site is showing fit kits, feet, adapters, etc, but it seems like things are divided by flush bars, fixed point, raised bars, etc. Seems like you have to piecemeal several components together, but I’m really not sure which parts I need?

Has anyone done this after the fact, meaning you started with the tracks only then later added your own system? Like I say I would prefer to buy used but want to be sure what I buy will actually fit. Thanks for any help.

 

I had a Leer 100XR on my truck that I ordered with the Thule rails factory installed.

I ordered the following:

Thule 460R - Rapid Podium Foot - Set of 4

Thule KIT3101 - Podium/EDGE Fit Kit 3101

Thule SquareBars- can't remember the exact size but I know that the 60-inch bars were too large for my rack and I had to send them back.
I got everything from Rack Outfitters

 

Thank you so much! This is perfect, cheers!