Originally Posted by
SuperBoots
Just bought a b4.2 used "like new" and it's got a broken hex key stuck in one of the screws on the bottom of the buggy, any ideas how to get this out?

Easiest way would be to use a dremel and cutoff wheel to get a little notch in there so you can turn it out with a flat blade screw driver. Be careful not to nick the chassis, the grove doesn't have to be deep.
Other option would be to drill and use an E-Z out extractor.
*edit* whoa, I see I was waaay late on that response