In my playing around I often watch videos on YouTube in the morning while I have my coffee, or at night when I can't sleep. A lot of them have some good information in them even if some of it is a little odd or even sometimes wrong. I try to take what is good and move on.
I watched one the other day that was a sort of interesting trick for turning tapers "between centers." You put a boring head in the tail stock. For low angle tapers you can just put a center in the boring head, and for sharper angles you can use a cup with a ball bearing in the chuck and the boring head. I get all of that and it makes sense. What got me and the guy makign the video didn't show (or I missed it) is:
How do you make sure the center or ball bearing cup in the boring head is on center vertically?
Since I don't have to turn a lot of tapers I thought this might be a nice stop gap technique instead of making a taper attachment for my lathe.