LOL
(<-- really laughing out loud) ...its only happened once on a rental car because its normally just from overuse and we don't do that many rentals. it can also happen from driving without the body on and running into something very hard or from taking a really hard hit during a race. it doesn't happen often and it isn't that difficult once you've done it a few times.
once you remove the 'lid' and you remove all the broken pieces (be sure to check for missing teeth on the gears in your servo gear assembly while you're in there), then its just a matter of positioning. if you're aware of where the potentionmeter 'fits' into the tie rod slider, then you know already if you have it right before you close it up. if you'd like to test, just leave the switch 'on' while you're taking it apart, and once you have it installed, place the 'lid' on (without inserting screws), lay the battery on the contacts and let it catch your transmitter signal and test as much as you like before removing the battery and rebuilding your MFA (main frame assembly).
NOTE: i know its a pain in the ass, i've done it MANY times on my own cars & customers' cars - BUT - its better than the alternative of buying a brand new MFA because of a broken steering servo. the tie rod slider and servo gear assembly work together as 'servo savers' and are MUCH cheaper than replacing an MFA. that's the reason i put together the '
Repair Kit' cuz you should always have that and a few other things handy since these are the only items that will occasionally go bad or need to be replaced