I did earlier and I can't remember the exact number. It was around 30dKH at 50ml/min.
I have a very high demand system. I was dosing close to 500ml per day before I put this online. It's well over 4dKH per day that my system would drop.
From what I've seen, people are getting around 40 dkh effluent out of the ACR (saturated CO2 at pH of around 6.0). I don't know if the small difference in pH (as compared to 6.2) accounts for all of that as the "automatic reactors" strive to keep CO2 constant, while adjusting effluent flow to manage alk/Ca and eliminating the need for a pH probe. In other words, I'm not sure you have to have 6.0 pH to achieve 40 dkh alk.