Awesome progress and yes thats the right kit with the flange, it should have come with a different rod but looks like you used it alright.

Clean those splines on the axle stub and the splines on the hub WELL with WD40 and a wire brush, and be sure to put ANTI SEIZE on everything when reassembling, axle nut threads, splines, I even put some on top of the axle nut itself when done.

I'm out to dinner but looks like you are going good, it's a little tricky to pop the outer joint off but basically you need to hammer on it ( I used a 3 lb mini sledge)while holding the axle shaft and having the outer joint "hanging down" at an angle, if it doesn't pop off with one or two whacks, rotate the whole axle, as there is a sweet spot where it comes out with one or two hits, you'll know bc it will surprise you lol.

Nice work so far!

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards