Depends on the situation I guess. I keep mine up and watch the other light. When it turns yellow I grab first or second. If your waiting for a turning light I keep it in so I don't miss my mark and make the drivers behind me mad.
Not available anywhere I've seen. They are usually pinned into the shaft so once you get the old one out the new one won't fit right. I wouldn't mess with steering components. In my experience as a tech if its sold as an assy. There's a reason why.
It will pull you around alot in the front. If your accelerating they are locked. Making it want to go straight into corners. In the rear would be best but you have to be carefull till you get used to it. The Aussie won't fit in in the trac loc case so you would have to spend 80 bucks to get the...