While the penetrating oil is soaking in... what's the full list of options for this:
* Drill and destroy the bolt
* Drill and apply a left-handed extractor, discussed here, with recommendations for drill bits
* Weld a lever on the bolt
* Cut a slot in the remnant and use a screwdriver bit
* Centre punch, as above
... what else?
Jonathan
Edited by - Jonathan Kay on 18 May 2014 20:52:42