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I have one of these.
https://www.wayfair.co.uk/storage-organisation/pdp/space-pro-relax-pull-down-hanger-bar-sppo1024.html
because I don't have a wardrobe, just open hanging (designed for a walk-in dressing room)
It's only rated at 8kg though, so it's only for shirts.
Also, you have to be very gently pulling it down, and control its descent or it will crash at the bottom and the mountings will come away. There's a lot of force being transmitted through crappy plastic bits.
I've measured and I think we're all good. I need one of the mechanisms with the partition attachment as i'm installing one of these in the top cupboard section: