I am refurbashing may old Haas VMC. The ball nut seals are brittle plastic 28 years old. I have modeled the seal and have made some from 910 but want a material that conforms a bit. It needs to hold up to motor oil and will be well lubricated. I have never had any interest in flexible filaments until now. What brand/material is good for an application like this? The seal is just a disc with the helical lead ball race incorporated.similar to a large thread only a Gothic arch for a 4mm ball