Nope, mine needs it though, with the weather change and almost 5 months since the last one, its getting some low spots.. .. Its really only a square pocket, sized for your machine and I do it in 0.3mm depth per pass increments. And I like to make a pencil swirls to make sure full coverage is obtained... I'll carve 0.3mm depth, then if thats not enough, bump it to 0.6mm (with a cut depth greater, that was its always doing the carve in one pass) and repeat until I get the whole board touched by the bit 👍