3) My vertical THK Z-axis doesn't have a cover for the linear screw (al my other axis came with covers) and it's clear that milled chips will end up on the screw and this will become a problem. I tried contacting THK looking for a cover for the slide with no luck. Are there suppliers of covers or is there a way I can make something myself? I'd imagine some type of accordion cover could work or perhaps some type of sheet metal cover but would love some advice.