I'm also curious about the feel of round bottom tools. I adjusted it by adding or removing pieces of paper underneath it. Here are shots of the pattern for the bed, above the bed casting; and then the bases and bed together. The taper on the bottom of the screw protrudes below the bottom of these inserts. I am learning! You need the gib adjustment screws pointed, to fit into dimples on the gib -- otherwise it'll slip right out when you move the carriage. Next is a fat dowel you'll need for a sprue plug -- I'd also suggest a short length of thin-walled metal tubing of some kind for cutting sprues and risers.
In this DIY video I build a wooden lathe. This video is the continuation of part 1. Please watch the part1 video first If you wish you can easily change. The world's biggest lathe (pictured above), was made by a company called Shin Nippon Koki of Japan. The rotor is able to turn a work piece weighing tons. This lathe was used to make shafts for massive propellers on cargo ships. Modern lathes are small, simple and easy to use. There are wood ones that vary in price anywhere from $ to $ I didn't want to spend $ on a lathe let alone $, plus I thought making . Well, let's pretend we want to make a chess piece -- a pawn, say -- about an inch across at the base. We'd need to put a piece of inch-diameter metal in the lathe. We'd need to move the cutting tool left-and-right to cut from the top of the pawn to the bottom (using the carriage, controlled by a 2' long threaded rod we'll discuss later).

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