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i've not used it but it appears you can get single dose hopper upgrades for the smart grinder pro which would help swap between beans using single dosing.
https://www.amazon.co.uk/FusedLine-Silicone-Anti-Popcorning-Compatible-Breville/dp/B0B5D15HY4
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Anyone tried this? (single dose hopper for Smart Grinder Pro)
One of the reasons I struggle with dialing in my shots is that even two back to back shots with the same grind and beans can taste different. I don't purge. So I'm wondering if retention is a problem and in the long run this is cheaper than throwing away grounds
The Sage one @HatBeard is selling on previous page would be fine