I am sort of contemplating a vacuum chuck to be used in my woodturning.. (Thanks Charles for bringing the need to know what I would use this for to my attention!). Don’t feel like putting together or making one….too many things already to do. But I would like one maybe someone started and decided they didn’t need it? Or someone has one for sale… I’m just tossing the idea around right now. I have seen the need for one lately..