How is the clearance between the cup and the bottom of the dispenser? It looks pretty tight with the new shield. Of course, your design should have the advantage of not spilling powder if its bumped, but that was a common complaint some had with the ATv4, and ST.
Here is another question, and if you feel its proprietary info, feel free not to answer (or say its a trade secret, etc). I love the fact that your trickler uses a Nema 17 motor. They are very easy to source and replace if needed. What is the service life of the bulk "motor"? I assume its an actuator or solenoid of some sort? Is it user replaceable if need be?