Everything matters to different degrees. 
The brass slugs on top, who makes them? I’ve been using brass weights as I find cheap ones on ebay but just adding here that the “best practice” approach is brass or other non ferrous metal especially near transformers. So people should avoid those honking iron doorstops from Amazon.
They’re made by a company called Edensound. They’re footers, but I just inverted them and now they’re weights
What brass weights do you buy from ebay? I’d be interested in picking up more weights to have handy
There are always a bunch of these in various weights available all all sorts of pricing but this one is typical.
Cool, thanks!
@dB_Cooper Thanks for the link. They’re much cheaper than “audiophile” brass weights.
Do you have a rule of thumb for how heavy the weights should be? Do you have an assortment of different weights (e.g. 200g, 300g, 500g) or do you just keep adding 200g weights to the piece of equipment until you’re happy?
Just place them where they remove any resonance from tapping on the top plate. One, two or three, depending on the gear, so no rule of thumb. Smaller weights in the right place is better than bigger weights trying to dampen a whole panel.
I do order a bunch of these in the appropriate size to fit. Thin Grungebuster Dots – Herbie's Audio Lab
So that they won’t scratch the surface of the components. Thin works best.
And yes… WAY cheaper than audiophile weights and cooler IMO.
@dB_Cooper have you played with blocks of hardwood instead of weights at all?
Couple of local dealers swear by it but I’ve yet to try
Not since my kids were young. 
Lol 
Interesting you bring that up. I had a dozen edenSound bear paws and took the spikes off, covered them in heat shrink, and then placed rubberized pads on the bottoms and use them on all of my many power supplies and small boxes/converters, etc.
I also have some of edenSound’s FatBoy discs, which are very nice for damping and come with their IsoDamp elastomer backing. If you want DIY for much less money, these are pretty hefty brass discs and you can use this silicone sheet backing material in the thickness of your choice from 1/25 to 1/8 inch.
Cool. Did the bear paws make a difference? And what was the reason for covering them in heat shrink? I’m no expert on weights or footers, however what I’ve read from mapleshade and others is that the raw brass seems to be the optimal key… (?)
That link for the DIY weight is nice and cheap. I only wonder about the 12 oz (3/4 lb) weight as not being that much, but maybe it’s sufficient for some jobs.
As an update I briefly tried brass weights on all my gear, but didn’t really notice an appreciable difference except for on the totaldac power supplies. Perhaps because bc they’re relatively small enclosures, and thin at that.