14x40 lathe conversion

Can't help it. I have the bug.
Now that my BP is closing in on
completion I am thinking about
gathering what I need to do my lathe.
It is a Grizzly 14x40.
My question is mounting the ballscrews.
I guess I can machine a block to hold
the ballnut on the carriage- behind the
carriage apron- where the ACME threading
screw is. Then mount the ballscrew's
right end in a block with a pair of angular
contact bearings holding it in place.
Now is it just best to let the left end
of the ballscrew just float?
The legnth of ballscrew I need is over 50".
What diameter is appropriate?
Anyone have any pictures of a conversion of a
lathe like this?


Thanks,
Scott