@tlin Let's see your setup.
Is pioneer 76 or 84"?
I might remember this.. are you using factory side Rails and rhino feet to clamp to siderails with a 76" platform?

Also, per your sig, tell me about the FCPs. how much lift did you get. Do you have extra weight?
33s tires?
I assume non KDSS...
pix and details. please, i'm
deffinitely interested!
Sorry for the delay....
1. 76" vs. 84" - I don't remember (not able to measure for a few more days).
2. 33" KM2's (pizza cutters) - they aren't wearing great, FYI. I've had KM2's previously on my 80-series without any gripes but this batch isn't my favorite (uneven wear and balancing wheels has been problematic).
3. Non-KDSS, no significant "extra weight" (sliders but planning a hidden winch soon). No plans for heavy armor, FYI. With that, the FCP's are working juuuust fine for me (went with them after a much-appreciated discussion with
@Vlad who helped me sift through the "which suspension upgrades do I go with" chat a few years ago).
Here's an edited version of a PM response from me to another member almost a year ago on the same Rhino platform topic (I really like this platform, FYI). Since the post below, I've learned that the OEM cross-rails aren't needed - I still haven't pulled them out but do plan to at some point in hopes of being able to fit a thin table under the Pioneer.
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I don't recall the length (76" vs. 84") but I intentionally got a wider one (54" is what I believe I went with vs. 48", which is "standard", from memory).
I also kept the OEM cross-rails in-place for additional lateral bracing - don't know if they're necessary or not an on many an occasion I contemplate removing them in order to tuck a low-profile table under the Rhino Rack (camping table) - one of those "some day" projects. Here's everything I went with (beyond the Pioneer rack itself):
Feet
Awning Brackets
Crossbars
The Back Bone is definitely a better looking alternative for the install (pricey from memory).
In the end, you're going to spend a decent amount to get what you need out of it but it's sure nice to have once it's all buttoned up. I've also adapted some t-slot fasteners from Home Depot (less expensive than the Rhino Rack items) to help with strap attachment points, etc.
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Hoping this helps - cheers!