I got sick of trying to use my drill press as a lathe in my attempts to build my extruder, so I threw this together in SolidWorks. I used 1/4" and 3/8" acrylic for most of it. There are three pieces of 3/4" HDPE for slides. It has 12 X 1/4-20 hex nuts, 36" of 1/4-20 threaded rod, two plastic knobs, and the drive assembly from a cordless drill. I left off the tailstock, live center, and cutting tool plate, but those can be easily fabricated. Use it at your own risk. I uploaded some pictures of the finished lathe and my first completely successful part. The lathe isn't the perfect solution, but it get's the job done.