Got them on (in addition to changing to my summer wheels). Only had one rivet that I couldn't really get in. Put 5 rivets on each side and the self-tapping screws, except for that one hole at the rear that you can't get to anyway. Overall pretty smooth going on. Used some soft-clamps to hold them in place, then taped them back and forth until they were centered. I think they "stretched" a bit since I started riveting in the middle and moved outward, which kept them nice and centered.
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Everything happens for a reason, except when it doesn't, but even then, you can, in hindsight, fabricate a reason that satisfies your belief system.
2018 2SS 1LE
2023 Colorado ZR2
2022 Stinger GT-line AWD