The ball screws will work great on your machine. You should install them right away.
The ball screws will give you better turning power, and faster manual rapid moves. You can achieve better finishes and better accuracy. Your finished tolerances will improve. Your tooling will last longer, it will actually get sharper, the more it's used.
You stand to save considerable operating energy costs, while reducing the motor temperature, thus extending it's life. You'll save money on machine lubricants.
You will increase the value of your mill to the highest market value, even if the machine isn't in very good condition. Once installed, the ball screws will never wear out.
Install them right away, it's simple to do, and you won't feel compelled to ask more questions about doing it. You'll be amazed at how simple it is.
Most of all, installing the ball screws will give you something better to do than post messages about some has-been weather girl from Alaska. Or her daughter, or grandchild, or neighbors, or boyfriend's mom, or her lawn, or her clothes, or her vaginal dryness, or her limousine driver, housekeepers, paper boy, pizza delivery, cable guy, pedicure girl, house painter, pet problems
But if you need advise on what color to paint the mill or your worktable, everyone will be glad to help with those more advanced tough issues.
I'm all for being nice, but you are a really fuctup douchebag half the time. Do you feel you need the attention you were deprived of earlier in life, or presently?
Can you not exhibit a small degree of self-control? Do you feel that you're entitled to continue this behavior because other people do it? Do you feel that you need to be a usenet gossip? Why would you imagine that anyone cares that you read a news article? The incomprehensible part is why can't you find anything else to do instead of posting this useless drivel? Is your mind that slow? Do you post crap because of your lack of knowlege of the metalworking subjects? If you read more good posts, you'd know more about metalworking, and about relevant topics.
Heat the garage and do some metal work. Are you the only dude on the f****ng planet that doesn't get pleasure out of using your machines? Are you one of those guys that gets every tool known, only to hang them up in the garage, and never use them? Do you have the mind of a child, that once you use a machine you're bored with it?
Contact one of the Chicago newspapers to see if you can write a gossip column if you want to find readers that give a shit about those nonsense topics.
Start a gossip blog, or make opinion videos for youtube, myspace etc, instead of what you do now. Or you could take up knitting, don't worry, lots of manly men knit. But more importantly, it a good hobby for gossipy twits.
You're insanely dimwitted about criticism of your senseless posts. You tend to take a sociopathic position, like most other people that are obsessive finatics about posting crap.