I’m running the ns4 in the receiver integrated in my 4x4labs bumper. The PO setup the bumper/ swing outs, so my knowledge of how the bumper goes to get and gets setup is from observing mine, rather than doing the actual install. The spare mount is adjustable on the labs bumper and mine is positioned as close to the vehicle as possible. I’m not sure if this answered your question, but I can snap more photos if that’s helpful.
The NS has only one drawback in that it won’t haul my 20” bike to the local DJ Park or the skate park. The crown is too small to fit on the rack, so it goes into the back.
The other vertical rack that folks run around here is the Recon, but I’m not sure it lowers enough to drop the tailgate all the way or clear the swing arms. I do like that they hold various wheel sizes regardless of crown configuration, but the mechanics are more complex. I purchased my NS over the recon originally based on cost and the robust simplicity of its construction. I can replace every piece of hardware on my ns4 at my local hardware store, and it’s extremely simple and robust.