If you recall from the previous post I had a sheared bolt inside the thread insert. The bolt extractor tool turned up, so lets fix that! Drill a hole in the center of the bolt, then tap the extractor into the hole. Now turn the extractor anti-clockwise using a tap handle, and its out! Crisis averted!, onward. On the remaining profiles I'm going to counter sink the hole a little before installing the thread inserts, this should make getting them flush easier.