Alkupai 12 inner ring is pristine metallic and gives great yields of Osmium, Palladium, Platinum and Painite.
Sure, you need to vent the mineral crud but I've had ocassional rocks giving 40%-50% of Platinum and 30%-40% Painite.
I can see a flaw in your "fingerprinting" idea Surly_Badger. I collect everything then vent the unwanted minerals when my drones expire, head a kilometer or 2 away and start again.
By the time I'm done, I'm loaded with precious metals and skewing the output figures for this system on your spreadsheet.
IProgenyI, did I read that right? Polahukuna? That's 125.88ly from Abres!
Alkupai is only 34.12 from Abres.