I have a Grizzly G9972Z Lathe I picked up last year for 400 dollars no tailstock is the only issue with it. Well I'm getting into machining more things all just practice and learning and what not. For my end goals I know I'll need a new and bigger chuck, got a 6 inch 4 jaw from someone but I need the backplate or faceplate or whatever you want to call it, I got one with the proper thread pitch but obviously need to do some final machining. The recess in the back needs a bit taken out so the shoulder fits on my spindle and the registration boss needs to have a little taken out. Mostly my question is how snug should all of this be. I have pretty good ideas but I like to have as much information as possible and from reliable sources (you guys) also any suggestions or the process you use would be appreciated I know there's more than one way to skin a cat and love to learn the different processes.