I maintain there's a tidy little sideliness/embryonic business for someone with the nous to start supplying these brushless spindles in decent numbers to the hobbyist CNC market.

At the minute a CNC hobbyist is faced with Dremel (eeugh) proxxon (nicer but feeble) ...then a leap up to something like kress (good but probably a bit too loud for most...and the price is starting to get chunky).

I reckon if you could knock these out somewhere in between the Proxxon price level (about £90) & Kress level (£150?) ...there'd be good steady demand.