I do have a lathe and was planning to make a set of plugs to go into the tube ends for turning them down. One plug will be to prevent my four jaw from crushing the tube and one to allow a live center in the other end.

I should take a step back and say I got on Aircraft Spruce and wound up buying tubing that will roughly come out to what you guys are describing. It's got a .065" wall which I just kind of figured would need to be turned down as well as opened up a little bit.

Thanks for the input, guys!