So... not one of my greatest victories yet then. Just in case there are other fools-with-tools as daft as me
This is wrong, oh so very wrong.
This is the enemy, take it out.
Not sure if the flat round bit a loose washer or a flange that's part of the bolt. Mr Chisel will investigate tonight...
Cheers, Midge
PS Obviously I managed to get a slight turn even going at it the wrong way, me being so strong an' all. It's Natures compensation for my total lack of mechanical understanding.
Pretty sure the washer is separate, its the dome that is your enermy lol...you can see where the drive part was sheared off during installation.
You can refit with standard 8mm bolts (I take it that you have additional security measures in place?)
Never had a prob getting them out, Chase loose with a chisel (similar to stuck CV bolt) or use a smal Irwin bolt gripper on the dome (tapped on lightly with a hammer). As soon as it starts, mole grips should be able to grip enough to wind them out. I managed to put mine back the same way.
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If you've been attacking the wrong end of the bolt with the mole grips the threads could be mangled which may then damage the captive nut thread as you remove them, so it would be wise to run a M8 tap back up through the captive nut to clean out any damage once the bolts are out