Reddit mentions of Sharpstone 2.5" Version 2.0 4pc Solid Top Grinder (Green)

SharpStone 2.0

I grind upside down, removing the kief tray first if it has anything in it to prevent it spilling back through the screen. I grind inverted until it is very fine, almost like powder that falls through the capsule openings. I exclusively use the fine screen sets in solid and easy valve. Vapor is better and more even use.

Downside is that the grinder gets gummed up immediately. Can only go 2 or 3 times before an iso bath. I own 7 grinders and rotate which one I am using to save the blades. This is one of my newer ones, but the two SharpStone 1.0 versions were my favorites until this.

Kozo Grinder 2.0

Honorable mention for this one. It is weird, but works, and is easy to use if you have difficulty with your hands, arthritis, etc.