will this be like Kiba's design, with servos operating the powder drop? That would be amazing.
I'm making good progress. It's using the same stepper motor as the trickler, and it will be mounted right on top of the A&D scale. Hope you all still have your wind panel roof. A few more days and I should be able to post some pictures. I've been iterating on the mechanical design for a few days (lots of 3D printing) and last night got the electronics to cycle it as well as found a good way to drop the powder into a small cup without splashing.
Thinking ahead to Sartorius, the core will be ideal for the A&D but I'd like to design a universal mount so that it can be mounted wherever.