Grumpy I have drilled the screw surgically then hacksawed the two spots you pointed out ( great minds think alike) and found that it was glued underneath aswell so I then put some heat into it and after a few minutes ave it a light tap and off it came so far so good . Next step tmrw is to exstract the magnet out of the alloy caseing which I'm going to try and hacksaw around the magnet but I will wait to see what you think I should do first . [Linked Image]
[Linked Image] I will give it a good clean first eg the glued side.