The magic grip is gone: cleats every 8 face cells, 6 grains tall, carry pockets uphill (about 71 grains/s against 90 flat) and overflow rolls back. Sloped filters always run downhill; grains travel by gravity and a shake, and sorting stays exact. Drawing needs another pass. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>