Hi Nathan many thanks for your post and can I take you up on that ? Ok I've just had a browse on e-bay for Delrin and there is loads of material available but can I ask what size should I be looking at ? It will hopefully drive a MDF made machine with a footprint size of 1 meter X 1/2 metre so how thick should the material be to make the nuts out of ? how would you recommend attaching them to the machines axis screws, glue or bolts ? Also what size hole will I need to drill for the tap to cut properly ? Also who are Dumpster CNC never heard of them, are they in the UK ? kind regards and sorry for all the dumb questions.