Pictures are here: https://www.two-sixties.co.uk/mgoc260/html/photopost/showphoto.php?photo=11285&title=zyg0000250&cat=502

The bolt is per my earlier post in this thread.

I found the application of heat to be the best way of removing these bolts. The thread-locking material makes them very tight to undo otherwise. The difference heat makes is unbelievable. May I suggest that if you use heat to get the bolts out, they should be perfectly capable of being re-used with a suitable threadlocking compound applied, such as Loctite 270.

Andrew