In the quest for less hand finishing and more consistent finish grinds. Based on a conversation on another forum. I decided to do a study of grinds with the same weight belt with the same dimensions. The only one like that I can find is the Trizac gator. The first pic is the grind after the A300. The rest are labeled on the blade. 100,65,45,30 You can see as I go the plunge was polished. Also I was looking at the speed of the machine. The 300,100 and 45 were running at about half speed on my mac