I am pretty new and am looking for a new chuck . I have been working with a borrowed 4 jaw and like the accuracy and want my own. My lathe is an early 60's Logan 1820 . I found this 6 inch 4 jaw chuck and backing plate on Ebay . Thoughts good bad ? And of course money is a concern . This chuck and backing plate is 140 plus 28 shipping. Thanks for any input.