The UPSes I've tried in the last few years all look to the OS as if it's a laptop battery, so they work just great. So I'd think anything current would work fine.
You can't really pick and choose what gets powder coated. You just have to grind off the bits you don't want after the fact. It's just a feature of the finish.
It's irrelevant that at some point firewire was proprietary. By the time apogee and weiss (and many others) were using firewire on audio devices, it was the standard. Synchronous USB was a nightmare for audio, especially at higher sample rates, and with more channels.
Today on PopMarket:
THE FLAMING LIPS - HEADY NUGGS: THE FIRST 5 WARNER BROS. RECORDS 1992-2002 (5LP) (LIMITED EDITION)
Limited Edition Vinyl Box Set – The ultimate LIPS collector’s item! Five titles/six discs. All titles with the exception of THE SOFT BULLETIN have been out of print and unavailable on vinyl for a decade! Numbered vinyl box set on standard, 140 gram, black vinyl. Includes the following LPs: Hit To Death In The Future Head (Single Disc) Transmissions From The Satellite Heart (Single Disc) Clouds Taste Metallic (Single Disc) The Soft Bulletin (Two Disc) Yoshimi Battles The Pink Robots (Single Disc)
Original Price: $124.98 USD
$73.99