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reprapturk
If there is no such case, where can I get Z lead screw nut you use for PrntQB V2?
Sorry I missed that one! I made the lead screw nut from a piece of UHMW polythene (an old plastic chopping board). I drilled a 1/4" hole through it and then tapped it to M8. I put the M8 threaded rod in an electric drill and ran the nut up and down a few times until it moved freely. It makes an excellent lead screw nut as it's pretty much self lubricating and, due to the flexibility in the material is virtually back lash free.