All good points! And I am no expert. FWIW, here is what I was going off of, price wise: https://www.digikey.ca/en/products/detail/texas-instruments/TL071HIDBV

All good points! And I am no expert. FWIW, here is what I was going off of, price wise: https://www.digikey.ca/en/products/detail/texas-instruments/TL071HIDBVR/14835784 https://www.digikey.ca/en/products/detail/texas-instruments/... https://www.digikey.ca/en/products/detail/texas-instruments/OPA2323IDR/22147099 https://www.digikey.ca/en/products/detail/texas-instruments/... In other words, the cheapest TL071 variant and the cheapest OPA2323 variant on Digikey Canada, in a quantity of 1 (ie wildly expensive). $0.31 vs $2.70 means that I shouldn't attempt math before coffee; 8.7x is still a big bump, although I acknowledge it's not the 12x I disinformationed earlier, with apologies to anyone reading.