1) Question Which one is better, Longworth or Doughnut?
Answer) It depends on the shape of the vessel. For traditional smaller bowls & plates, the Longworth Style is more self-centering and a bit faster to set up. You still have to use the tailstock for extra support until you get down to the last 1” or so.
Answer) For larger plates, platters or bowls, the doughnut chuck provides a more secure hold. You have to take care to make sure the vessel is centered and setup takes a bit longer.
Answer) For vessels which are more vases like (taller rather than shorter) the doughnut chuck is a clear winner.
ii) The Type 2 is equipped with a threaded faceplate and threads directly onto the lathe spindle.
iii) An OPTIONAL accessory is a set of Doughnut rings for use with the Type 2 Longworth Style Chuck only. The Type 2 chuck may be used in the traditional Longworth scrolling mode or as a traditional Doughnut Chuck with doughnut rings.