Mixed reviews on these. Out of the bag they glide pretty silky smooth. When you go to mount them you'll find they aren't 'linear' but can be made so with fastening to a frame. I would prefer to see a new product arrive as close to dead-flat as possible and not require torquing or bending to comply to linear. That said they are completely usable with effort put in and glide nicely. Won't know until after the printer is built if these adjustments impact the print in any way. Also, they are not laser engraved despite what another review states. They appear to be the same generic rails everyone sells. Note though that neither the pictures nor the description imply they are engraved.
Mixed reviews on these. Out of the bag they glide pretty silky smooth. When you go to mount them you'll find they aren't 'linear' but can be made so with fastening to a frame. I would prefer to see a new product arrive as close to dead-flat as possible and not require torquing or bending to comply to linear. That said they are completely usable with effort put in and glide nicely. Won't know until after the printer is built if these adjustments impact the print in any way. Also, they are not laser engraved despite what another review states. They appear to be the same generic rails everyone sells. Note though that neither the pictures nor the description imply they are engraved.