Honestly I'm mostly interested in the centrifugal brewing system. 85-90C doesn't seem very low to me, maybe just below my brewing range across methods (192-204). Sounds like your current method would be similar to an Aeropress.

You said you'd spent 12 hours a day pulling shots- were you using espresso for the coffee? Is this freeze dried espresso, with more water added to it (like an Americano)?

I'd truly love to know more about your brew technique and process.