Talking of heat, I think the Rackbrute case I bought had a problem, it got really hot and smelled like burning plastic and made the room stink. This ended up going back to the supplier who fit a new Power supply and sent it back. I'd lost faith in it by this point so left it boxed up and sold it on.
I'd never had a problem with my TipTop uZeus (x2) or my subsequent KonstantLab Power, I even found some of my modules ran cooler when NOT in the Rackbrute.
Hopefully this was a one-off and you'll have a good experience with Arturia.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.