Ball Screw Options

Well, I've taken the plunge and purchased my mill for the CNC
retrofit. I bought an older Bridgeport with an M head. It has a
9x32 work table and its perfect for me because I get the full 12" Y
travel but the overall machine will fit in my garage much better than
a full 9x42.

Amoung other things, I'm trying to resolve is what I'm going to do
for the ballscrews. I would really like input on what my options
are. I've looked into the archives and am starting to get the angle
of the dangle.

1) Is one option to install anti-backlash nuts on the existing stock
screws? I've read about making/installing anti-backlass nuts but
can't figure out if that applys only to ballscrews.

2) If I were to install new ballscrews and nuts what specs should I
look for? Is 5 tpi the standard? How about the diameter?

3) If I do #2 above am I right in that I have 2 options, either buy a
bolt in kit or buy the ballscrews and fabricate how the nuts attach
to the table?

4) What do I have to do/consider for attaching the ends to my
servo/stepper motors? Do I have to do any machining to them for this?

I came across Nook Industries www.nookind.com. Has anyone used
these? Are they the most cost effective ones? Is there such a thing
as a cost effective bolt in? The only price I've seen is in McMaster
Carr for @800 buckies. I sure wish I could do it for less. Any help
greatly appreciated!

Mark took the plunge