I really like the k5 it is faster to change from different size of screws. I hesitated to update because of some of the reviews about the dust collection hook up. That to me one of the improvements it works perfect no dust to cleanup . That didn't really work on My K3 or K4 it tended to clog !! Just get the 2 1/2 to 1 1/4 adapter. I mounted the connection solid to the board does not fall off. I am including a picture of the setup.