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The alignment holes lined up perfectly with my existing uprights, so installation took maybe ten minutes total. The Series 4000 version feels rock solid once torqued down, and there's zero wobble when I hang heavier attachments off the rack.

Bolting these onto my Series 4000 uprights took about ten minutes total, and the connection feels rock-solid with zero wobble when I hang stuff off it. The two series options made it easy to match what I already had, which I appreciate.

The fit is dead-on precise whether you grab the 4000 or the other series, so no wobble once everything's torqued down. I spent an afternoon rearranging my whole setup and these made it stupidly easy to break down and rebuild clean.