Dunno about the AY412... but a GD503 + Lee PPM + Omega two-speed trickler is faster over the long run for me than a Chargemaster. For short batches like load testing i.e. 5-10 each of different charge weights - the advantage might swing the other way slightly, but for loading a couple hundred of one known good load... the Sartorius wins hands down. I heard the GD503 was being discontinued; hopefully the AY412 will be a suitable replacement.